Factorization Announcements

Elliptic Curve method

• Factorization of F10 (from Richard Brent's web site).
• A factor of F13 (from Richard Brent's web site).
• 54-digit penultimate prime found with ECM.
• Large factorizations found by ECM (from Richard Brent's web site).
• 100 large ECM factorizations (from Paul Zimmermann's web site).

Quadratic Sieve

• 116-digit factorization.
• Factorization of RSA-120.
• Factorization of RSA-129.
• Factorization of a 135-digit number using three large primes.

Special Number Field Sieve

• Early SNFS records (from http://krum.rz.uni-mannheim.de/cabench/sieve-record.html).
• 186-digit factorization.
• 211-digit factorization.
• 233-digit factorization (from ftp://ftp.cwi.nl/pub/herman/SNFSrecords/SNFS-233).
• 244-digit factorization.
• 248-digit factorization.
• 274-digit factorization. Also available here.
• NEW! 313-digit (1039-bit!) factorization.

General Number Field Sieve

• 116-digit factorization.
• 119-digit factorization.
• Factorization of RSA-130.
• Factorization of RSA-140.
• Factorization of RSA-155.
• Factorization of 512-bit Simon Singh cipher challenge number.
• Factorization of 158-digit cofactor of 2^953 + 1.
• Factorization of RSA-160.
• Factorization of a 164-digit cofactor of 2^1826 + 1 (from http://www.rkmath.rikkyo.ac.jp/~kida/gnfs164e.htm).
• Factorization of RSA-576.
• Factorization of 176-digit number.
• Factorization of RSA-640.
• Factorization of RSA-200.

Other factoring algorithms

• Factorization of F8 (from Richard Brent's web site).

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