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Product of two distinct primes ≡ 3 (mod 4)
In mathematics, a natural number n is a Blum integer if n = p × q is a semiprime for which p and q are distinct prime numbers congruent to 3 mod 4. That
Blum_integer
Venezuelan computer scientist
Manuel Blum (born 26 April 1938) is a Venezuelan-born American computer scientist who received the 1995 ACM Turing Award "In recognition of his contributions
Manuel_Blum
Pseudorandom number generator
Blum Blum Shub (B.B.S.) is a pseudorandom number generator proposed in 1986 by Lenore Blum, Manuel Blum and Michael Shub that is derived from Michael
Blum_Blum_Shub
This is a list of notable integer sequences with links to their entries in the On-Line Encyclopedia of Integer Sequences. OEIS core sequences Index to
List_of_integer_sequences
Natural number
77 is the second composite member of the 19-aliquot tree with 65 a Blum integer since both 7 and 11 are Gaussian primes. the sum of three consecutive
77_(number)
Natural number
congruent to 3 modulo 4, 57 = 3 ⋅ 19 {\displaystyle 57=3\cdot 19} is a Blum integer. It is a Leyland number, because 57 = 2 5 + 5 2 {\displaystyle 57=2^{5}+5^{2}}
57_(number)
Natural number
000,696,445,844,586,496) have no common digits. 713 = 23 × 31. It is a Blum integer. In Judaism there are 713 letters on a Mezuzah scroll. 714 = 2 × 3 ×
700_(number)
Natural number
it a square-free integer. 69 is a Blum integer since the two factors of 69 are both Gaussian primes, and an Ulam number, an integer that is the sum of
69_(number)
Natural number
prime numbers congruent to 3 mod 4, 177 is the eleventh Blum integer, where the first such integer 21 divides the aliquot part of 177 thrice over. The first
177_(number)
Natural number
are a total of 21 prime numbers between 100 and 200. 21 is the first Blum integer, since it is a semiprime with both its prime factors being Gaussian primes
21_(number)
Natural number
There are 632 13-bead necklaces with 2 colors 633 = 3 × 211. It is a Blum integer and the sum of three consecutive primes (199 + 211 + 223). 634 = 2 ×
600_(number)
Topics referred to by the same term
in Washington Blum Lakes, six lakes in Washington Blum axioms, in computational complexity theory Blum integer, in mathematics Blum's speedup theorem
Blum
Natural number
35,13,1,0) of three numbers to the Prime 13 in the 13-Aliquot tree. a Blum integer, since its two prime factors, 3 and 31 are both Gaussian primes. a repdigit
93_(number)
Natural number
a Blum integer. 309 is a centered icosahedral number. "Numbermatics: The Number Explorer". Numbermatics. Apr 30, 2024. Retrieved Apr 30, 2024. "Blum Number"
309_(number)
Natural number
Since those prime factors are Gaussian primes, this means that 141 is a Blum integer. a Hilbert prime Sometimes used as an acronym [1 representing A and 4
141_(number)
Natural number
is a Blum integer. 418 = 2 × 11 × 19. It is a sphenic number, a balanced number. and the fourth 71-gonal number. It is the sum of the integers between
400_(number)
Natural number
536 1's in all partitions of 23 into odd parts. 537 = 3 × 179. It is a Blum integer, a D-number, and a zero of the Mertens function. 538 = 2 × 269. It is
500_(number)
Natural number
natural number following 248 and preceding 250. Additionally, 249 is: a Blum integer. a semiprime. palindromic in base 82 (3382). a Harshad number in bases
249_(number)
Proving validity without revealing other data
system by Oded Goldreich verifying that a two-prime modulus is not a Blum integer. Oded Goldreich, Silvio Micali, and Avi Wigderson took this one step
Zero-knowledge_proof
Natural number
Since those prime factors are Gaussian primes, this means that 133 is a Blum integer. 133 is the number of compositions of 13 into distinct parts. 133 is
133_(number)
Natural number
proper factors of 201, 3 and 67, are both Gaussian primes, 201 is a Blum integer. 201 is an HTTP status code indicating a new resource was successfully
201_(number)
Number used for counting
2, 3, and so on, possibly excluding 0. The terms positive integers, non-negative integers, whole numbers, and counting numbers are also used. The set
Natural_number
Natural number
balanced number, the Mertens function of 812 returns 0 813 = 3 × 271, Blum integer (sequence A016105 in the OEIS) 814 = 2 × 11 × 37, sphenic number, the
800_(number)
Natural number
Since its prime factors 7 and 23 are both Gaussian primes, 161 is a Blum integer. 161 is a palindromic number. 161/72 is a commonly used rational approximation
161_(number)
Natural number
is a Blum integer. 129 is a repdigit in base 6 (333). 129 is a happy number. 129 is a centered octahedral number. "Sloane's A016105 : Blum integers". The
129_(number)
Natural number
number, a centered 36-gonal number, a Fermat pseudoprime to base 5, and a Blum integer. It is both the sum of two positive cubes and the difference of two positive
217_(number)
Asymmetric key encryption algorithm
and testing the two Legendre symbols. If p, q = 3 mod 4 (i.e., N is a Blum integer), then the value N − 1 is guaranteed to have the required property. The
Goldwasser–Micali cryptosystem
Goldwasser–Micali_cryptosystem
Natural number
number. 392 = 23 × 72. It is an Achilles number. 393 = 3 × 131. It is a Blum integer and a zero of Mertens function. 394 = 2 × 197 = S5 It is a Schröder number
300_(number)
Natural number
a Blum integer. a member of the 13-aliquot tree. Sloane, N. J. A. (ed.). "Sequence A078972 (brilliant numbers)". The On-Line Encyclopedia of Integer Sequences
253_(number)
Asymmetric key encryption algorithm
The Blum–Goldwasser (BG) cryptosystem is an asymmetric key encryption algorithm proposed by Manuel Blum and Shafi Goldwasser in 1984. Blum–Goldwasser is
Blum–Goldwasser_cryptosystem
USA computer scientist and mathematician
computational hardness assumption that integer factorization is infeasible.[BBS] Blum is also known for the Blum–Shub–Smale machine, a theoretical model
Lenore_Blum
Model of computation over real numbers
In computation theory, the Blum–Shub–Smale machine, or BSS machine, is a model of computation introduced by Lenore Blum, Michael Shub and Stephen Smale
Blum–Shub–Smale_machine
Mathematical model of computer
as well as comparisons, but not modulus or rounding to integers. The reason for avoiding integer rounding and modulus operations is that allowing these
Real_RAM
Approach to public-key cryptography
agreement with a symmetric encryption scheme. They are also used in several integer factorization algorithms that have applications in cryptography, such as
Elliptic-curve_cryptography
Public-key encryption scheme
function whose security, like that of RSA, is related to the difficulty of integer factorization. The Rabin trapdoor function has the advantage that inverting
Rabin_cryptosystem
Complexity class used in circuit complexity
have been explicitly constructed under the assumption that factoring Blum integers is hard (i.e. requires circuits of size 2 p o l y ( n ) {\displaystyle
TC0
Arithmetic operation
numbers: the base, b, and the exponent or power, n. When n is a positive integer, exponentiation corresponds to repeated multiplication of the base: that
Exponentiation
theorem of arithmetic Square-free Square-free integer Square-free polynomial Square number Power of two Integer-valued polynomial Rational number Unit fraction
List_of_number_theory_topics
Algorithm for public-key cryptography
it is practical to find three very large positive integers e, d, and n, such that for all integers x (0 ≤ x < n), both (xe)d and x have the same remainder
RSA_cryptosystem
Indian mathematician
regularity lemma in Graph Theory 2020. Foundations of Data Science. (with Avrim Blum and John Hopcroft). 2009. Spectral Algorithms.(with Santosh Vempala) "Clustering
Ravindran_Kannan
Two raised to an integer power
of the form 2n where n is an integer, that is, the result of exponentiation with the number two as the base and integer n as the exponent. In the fast-growing
Power_of_two
Public-key cryptosystem
over any cyclic group G {\displaystyle G} , like multiplicative group of integers modulo n if and only if n is 1, 2, 4, pk or 2pk, where p is an odd prime
ElGamal_encryption
Quantum-safe key encapsulation mechanism
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
ML-KEM
Key agreement protocol
consisting of a private key d {\displaystyle d} (a randomly selected integer in the interval [ 1 , n − 1 ] {\displaystyle [1,n-1]} ) and a public key
Elliptic-curve_Diffie–Hellman
Integer having a non-trivial divisor
number is a positive integer that can be formed by multiplying two smaller positive integers. Accordingly, it is a positive integer that has at least one
Composite_number
Product of an integer with itself
number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. For example, 9 is
Square_number
RSA and the Blum Blum Shub pseudorandom number generator, rests in the difficulty of factorizing large integers. If factorizing large integers becomes easier
TWIRL
Integer whose multiples are digit rotations
A cyclic number is an integer for which cyclic permutations of the digits are successive integer multiples of the number. The most widely known is the
Cyclic_number
Inherent difficulty of computational problems
or no. Notable examples include the traveling salesman problem and the integer factorization problem. It is tempting to think that the notion of function
Computational complexity theory
Computational_complexity_theory
Mechanism for authenticating cryptographic keys
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Web_of_trust
Non-federated cryptographic protocol
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Signal_Protocol
Digital verification standard
1 {\displaystyle p-1} is a multiple of q {\displaystyle q} . Choose an integer h {\displaystyle h} randomly from { 2 … p − 2 } {\displaystyle \{2\ldots
Digital_Signature_Algorithm
Numbers with many divisors
a positive integer that has more divisors than all smaller positive integers. If d(n) denotes the number of divisors of a positive integer n, then a positive
Highly_composite_number
Method of exchanging cryptographic keys
base g = 5 (which is a primitive root modulo 23). Alice chooses a secret integer a = 4, then sends Bob A = ga mod p A = 54 mod 23 = 4 (in this example both
Diffie–Hellman_key_exchange
Cryptographic algorithm for digital signatures
Bézout's identity). Alice creates a key pair, consisting of a private key integer d A {\displaystyle d_{A}} , randomly selected in the interval [ 1 , n −
Elliptic Curve Digital Signature Algorithm
Elliptic_Curve_Digital_Signature_Algorithm
System that can issue, distribute and verify digital certificates
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Public_key_infrastructure
Number that permute or shift cyclically when multiplied by another number
mathematics, the transposable integers are integers that permute or shift cyclically when they are multiplied by another integer n {\displaystyle n} . Examples
Transposable_integer
Unsolved problem in cryptography
modulus N, a task believed to be impractical if N is sufficiently large (see integer factorization). The RSA key setup routine already turns the public exponent
RSA_problem
Integer having only small prime factors
In number theory, an n-smooth (or n-friable) number is an integer whose prime factors are all less than or equal to n. For example, a 7-smooth number
Smooth_number
Ten raised to an integer power
of the integer powers of the number ten; in other words, ten multiplied by itself a certain number of times (when the power is a positive integer). By definition
Power_of_10
Figurate number
The triangular numbers or triangle numbers are the sequence of positive integers that can be represented as a lattice of points arranged in an equilateral
Triangular_number
Australian computer scientist (born 1944)
most efficient general string searching algorithm known today. Along with Blum, Floyd, Rivest, and Tarjan, he described median of medians, the first worst-case
Vaughan_Pratt
Cryptographic key management algorithm
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Double_Ratchet_Algorithm
Positive integer of the form (2^(2^n))+1
them, is a positive integer of the form: F n = 2 2 n + 1 , {\displaystyle F_{n}=2^{2^{n}}+1,} where n is a non-negative integer. The first few Fermat
Fermat_number
Digital signature scheme
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Schnorr_signature
Mathematical scheme for verifying the authenticity of digital documents
is the product of two random secret distinct large primes, along with integers, e and d, such that e d ≡ 1 (mod φ(N)), where φ is Euler's totient function
Digital_signature
Number divisible only by 1 and itself
trial division, tests whether n {\displaystyle n} is a multiple of any integer between 2 and n {\displaystyle {\sqrt {n}}} . Faster algorithms include
Prime_number
Computational method
factorization expresses a polynomial with coefficients in a given field or in the integers as the product of irreducible factors with coefficients in the same domain
Factorization_of_polynomials
IEEE standardization project for public-key cryptography
signature, and encryption schemes using several mathematical approaches: integer factorization, discrete logarithm, and elliptic curve discrete logarithm
IEEE_P1363
Number that is less than the sum of its proper divisors
excessive number is a positive integer for which the sum of its proper divisors is greater than the number. The integer 12 is the first abundant number:
Abundant_number
Positive integer that is an integer power of another positive integer
factors, or, in other words, an integer that can be expressed as a square or a higher integer power of another integer greater than one. More formally
Perfect_power
Algorithm for public key cryptography
=\operatorname {lcm} (p-1,q-1)} . lcm means Least Common Multiple. Select random integer g {\displaystyle g} where g ∈ Z n 2 ∗ {\displaystyle g\in \mathbb {Z} _{n^{2}}^{*}}
Paillier_cryptosystem
Digital signature scheme
keys are elements of G 2 {\displaystyle G_{2}} , and the secret key is an integer in [ 0 , q − 1 ] {\displaystyle [0,q-1]} . Working in an elliptic curve
BLS_digital_signature
Form of public key cryptography
problem). The problem is as follows: given a set of integers A {\displaystyle A} and an integer c {\displaystyle c} , find a subset of A {\displaystyle
Merkle–Hellman knapsack cryptosystem
Merkle–Hellman_knapsack_cryptosystem
Hypothesis in computational complexity theory
include: Goldwasser–Micali cryptosystem (quadratic residuosity problem) Blum Blum Shub generator (quadratic residuosity problem) Paillier cryptosystem (decisional
Computational hardness assumption
Computational_hardness_assumption
Product of two prime numbers
where they are used by RSA and pseudorandom number generators such as Blum Blum Shub. These methods rely on the fact that finding two large primes and
Semiprime
Short sequence of bytes used to authenticate or look up a longer public key
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Public_key_fingerprint
Infinite integer series where the next number is the sum of the two preceding it
The Lucas sequence is an integer sequence named after the mathematician François Édouard Anatole Lucas (1842–1891), who studied both that sequence and
Lucas_number
Type of cryptosystem
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Threshold_cryptosystem
Augmented password-authenticated key exchange protocol
logarithms modulo N is infeasible. All arithmetic is performed in the ring of integers modulo N, Z N {\displaystyle \scriptstyle \mathbb {Z} _{N}} . This means
Secure Remote Password protocol
Secure_Remote_Password_protocol
Asymmetric cryptographic technique based on integer factorisation
cryptographic technique, whose security, like Rabin depends on the difficulty of integer factorization. Unlike Rabin this algorithm does not produce an ambiguity
Schmidt-Samoa_cryptosystem
Class of natural numbers with many divisors
number of divisors an integer has and that integer raised to some positive power. For any possible exponent, whichever integer has the greatest ratio
Superior highly composite number
Superior_highly_composite_number
Scheme often used with RSA encryption
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Optimal asymmetric encryption padding
Optimal_asymmetric_encryption_padding
Result of multiplying four instances of a number together
fourth power is always 1. Every positive integer can be expressed as the sum of at most 19 fourth powers; every integer larger than 13792 can be expressed as
Fourth_power
Numbers k where x - phi(x) = k has many solutions
theory, a branch of mathematics, a highly cototient number is a positive integer k {\displaystyle k} which is above 1 and has more solutions to the equation
Highly_cototient_number
Digital signature scheme
parameters, the second phase computes the key pair for a single user: Choose an integer x {\displaystyle x} randomly from { 1 … p − 2 } {\displaystyle \{1\ldots
ElGamal_signature_scheme
Prime number of the form 2^n – 1
of two. That is, it is a prime number of the form Mn = 2n − 1 for some integer n. They are named after Marin Mersenne, a French Minim friar, who studied
Mersenne_prime
Hybrid encryption in cryptography
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Integrated_Encryption_Scheme
Number that cannot be written as an aliquot sum
untouchable number is a positive integer that cannot be expressed as the sum of all the proper divisors of any positive integer. That is, these numbers are
Untouchable_number
Cryptographic method
for Falcon-1024. The signature verification can be done entirely using integers modulo q {\displaystyle q} . Contrarily, the signature generation uses
Falcon_(signature_scheme)
Asymmetric key encryption algorithm
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
Cramer–Shoup_cryptosystem
Sum of a number's digits
sum of the base 10 digits of the integers 0, 1, 2, ... is given by OEIS: A007953 in the On-Line Encyclopedia of Integer Sequences. Borwein & Borwein (1992)
Digit_sum
Digital signature resilient to quantum cryptography
product of two large and unknown primes into the constituent primes. The integer factorization problem is believed to be intractable on any conventional
Ring learning with errors signature
Ring_learning_with_errors_signature
Asymmetric encryption algorithm developed by Robert McEliece
v t e Public-key cryptography Algorithms Integer factorization Benaloh Blum–Goldwasser Cayley–Purser Damgård–Jurik GMR Goldwasser–Micali Naccache–Stern
McEliece_cryptosystem
convergence and varying statistical quality):[citation needed] ACORN generator Blum Blum Shub Lagged Fibonacci generator Linear congruential generator Mersenne
List_of_algorithms
Number raised to the third power
cube of an integer. The non-negative perfect cubes up to 603 are (sequence A000578 in the OEIS): Geometrically speaking, a positive integer m is a perfect
Cube_(algebra)
Integer where the average of its positive divisors is also an integer
number theory, an arithmetic number is an integer for which the average of its positive divisors is also an integer. For instance, 6 is an arithmetic number
Arithmetic_number
Number equal to the sum of its proper divisors
In number theory, a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number
Perfect_number
Integer filtered out using a sieve similar to that of Eratosthenes
(Numbers that are both lucky and prime)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Guy, Richard K. (2004). Unsolved problems in
Lucky_number
and Shigenori Uchiyama. The system works in the multiplicative group of integers modulo n, ( Z / n Z ) ∗ {\displaystyle (\mathbb {Z} /n\mathbb {Z} )^{*}}
Okamoto–Uchiyama_cryptosystem
BLUM INTEGER
BLUM INTEGER
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Blue Sky; Blue
Female
Yiddish
(בְּלוּמָ×) Yiddish name BLUMA means "flower." Also spelled Blume.
Girl/Female
Tamil
Neelavathi | நீலாவாதீÂ
Blue
Neelavathi | நீலாவாதீÂ
Boy/Male
Tamil
Blue
Surname or Lastname
German
German : topographic name for someone who lived by a tree that was particularly noticeable in some way, from Middle High German, Old High German boum ‘tree’, or else a nickname for a particularly tall person.Jewish (Ashkenazic) : ornamental name from German Baum ‘tree’, or a short form of any of the many ornamental surnames containing this word as the final element, for example Feigenbaum ‘fig tree’ (see Feige) and Mandelbaum ‘almond tree’ (see Mandel).English : probably a variant spelling of Balm, a metonymic occupational name for a seller of spices and perfumes, Middle English, Old French basme, balme, ba(u)me ‘balm’, ‘ointment’ (see Balmer).
Boy/Male
Hindu
Blue, With blue eyes
Boy/Male
Tamil
Blue
Boy/Male
Indian, Sanskrit
Blue Throated; Blue Necked
Surname or Lastname
English and North German
English and North German : from Middle English plum(b)e, Middle Low German plum(e) ‘plum’, hence a topographic name for someone who lived by a plum tree, or a metonymic occupational name for a fruit grower. Reaney and Wilson, however, derive the English name from Old French plomb ‘lead’ (Latin plumbum), regarding it as a metonymic occupational name for a plumber.German and Jewish (Ashkenazic) : variant of Blum.Americanized form of Pflum.
Female
Yiddish
(בְּלוּמֶע) Variant form of Yiddish Bluma, BLUME means "flower."
Surname or Lastname
English
English : habitational name from places in Lancashire and West Yorkshire called Lumb, both apparently originally named with Old English lum(m) ‘pool’. The word is not independently attested, but appears also in Lomax and Lumley, and may be reflected in the dialect term lum denoting a well for collecting water in a mine. In some instances the name may be topographical for someone who lived by a pool, Middle English lum(m).English : variant of Lamb.Chinese : variant of Lin 1.Chinese : possibly a variant of Lan.
Boy/Male
Hindu
Blue, With blue eyes
Surname or Lastname
Jewish (Ashkenazic)
Jewish (Ashkenazic) : ornamental name based on Yiddish blum or German Blume ‘flower’.English : variant of Bloomer.German (mostly Blümer) : variant of blume (see Blum).
Boy/Male
Tamil
Neelanjan | நீலஂஜந
Blue, With blue eyes
Neelanjan | நீலஂஜந
Boy/Male
Hindu, Indian, Sanskrit
Blue Throated; Blue Necked
Boy/Male
Tamil
Blue
Boy/Male
Indian, Sanskrit
Blue Throated; Blue Necked
Boy/Male
Tamil
Nilanjan | நீலாஂஜந
Blue, With blue eyes
Nilanjan | நீலாஂஜந
Girl/Female
Australian, German, Greek
A Flower; Bloom
Surname or Lastname
English
English : generally a fairly recent Americanized form of German Blau or the French cognate Bleu.
BLUM INTEGER
BLUM INTEGER
Boy/Male
Tamil
Pardhu | பாரà¯à®¤à¯à®‚
Arjuna
Girl/Female
American, British, English, Latin
Lovable; Abbreviation of Amanda; Worthy of Being Loved; One that Must be Loved
Surname or Lastname
English
English : variant of Bannister.The naturalist John Banister (1650–92) was born in Gloucestershire, England, and came to VA in 1678.
Boy/Male
Tamil
World known
Boy/Male
Indian, Sanskrit
Perfect; Superior
Biblical
who is drawn by force
Boy/Male
Australian, German, Norse, Scandinavian, Swedish
Of the Chosen; Of the Highest Race; Exalted Son
Girl/Female
Christian & English(British/American/Australian)
Consecrated to God
Female
Egyptian
, the wife of Ouzahor.
Girl/Female
Irish
magnificent.
BLUM INTEGER
BLUM INTEGER
BLUM INTEGER
BLUM INTEGER
BLUM INTEGER
superl.
Severe or over strict in morals; gloom; as, blue and sour religionists; suiting one who is over strict in morals; inculcating an impracticable, severe, or gloomy mortality; as, blue laws.
n.
See Saunders-blue.
n.
The blue-cheeked honeysucker of Australia.
n.
A dim, confused appearance; indistinctness of vision; as, to see things with a blur; it was all blur.
v. i.
To look sullen; to be of a sour countenance; to be glum.
superl.
Pale, without redness or glare, -- said of a flame; hence, of the color of burning brimstone, betokening the presence of ghosts or devils; as, the candle burns blue; the air was blue with oaths.
superl.
Having the color of the clear sky, or a hue resembling it, whether lighter or darker; as, the deep, blue sea; as blue as a sapphire; blue violets.
superl.
Low in spirits; melancholy; as, to feel blue.
a.
Having blue veins or blue streaks.
a.
Deep blue, like smalt.
a.
Of inflexible honesty and fidelity; -- a term derived from the true, or Coventry, blue, formerly celebrated for its unchanging color. See True blue, under Blue.
v. t.
To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.
a.
Having blue eyes.
n.
Alt. of Blue-bonnet
v. t.
To make blue; to dye of a blue color; to make blue by heating, as metals, etc.
a.
Having the blue color of the sky; azure; as, a sky-blue stone.
superl.
Suited to produce low spirits; gloomy in prospect; as, thongs looked blue.