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In mathematics, RSA-640 is one of the RSA numbers - large semiprimes that are part of the RSA Factoring Challenge. RSA-640 has a length of 193 decimal digits and has not been factored so far. A cash prize of 20,000 USD has been offered for successful factorisation by RSA Security. RSA-640 = 31074182404900437213507500358885679300373460228427275457201619488232064405 18081504556346829671723286782437916272838033415471073108501919548529007337 724822783525742386454014691736602477652346609

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Cryptographic algorithms

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Topics: RSA-640, RSA Security, RSA Number, RSA 130, RSA 140, RSA 155...

RSAThis article is about the RSA cryptosystem. For other meanings, see RSA (disambiguation). RSA is a cipher algorithm. It is an asymmetric algorithm and plays a key role in public key cryptography. It is widely used in electronic commerce protocols. The algRSA SecurityRSA Security is a NASDAQ-traded public company. Its headquarters are in Bedford, Massachusetts, and it maintains offices in Ireland, the United Kingdom, Singapore, and Japan. The company currently known as "RSA Security" was formerly known as Security DynRSA numberThe RSA numbers listed by security company RSA Security, are certain large semiprime numbers (i. numbers with exactly two prime factors); they form the basis of the RSA Factoring Challenge, in which factorisations for these numbers are sought. Cash prizes
RSA-130In mathematics, RSA-130 is one of the RSA numbers, large semiprimes that are part of the RSA Factoring Challenge. It was factored on April 10 1996 by a team led by Arjen K. Lenstra and comprised of Jim Cowie, Marije Elkenbracht-Huizing, Wojtek Furmanski,RSA-140In mathematics, RSA-140 is one of the RSA numbers, large semiprimes that are part of the RSA Factoring Challenge. It was factored on February 2 1999 by a team led by Herman te Riele and comprised of Stefania Cavallar, Bruce Dodson, Arjen K. Lenstra, PaulRSA-155In mathematics, RSA-155 is one of the RSA numbers, large semiprimes that are part of the RSA Factoring Challenge. It was factored on August 22 1999 by a team led by Herman te Riele and comprised of Stefania Cavallar, Bruce Dodson, Arjen K. Lenstra, Walter
RSA-160RSA-576RSA-129
RSA-150RSA-100RSA-110
RSA-120RSA-640RSA-704
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