Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
5461457
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 272
TF target 266
Factored
FactorDigitsBitsDate
6646601209210094768051112479.12025-03-18 15:43:06
ECM
DigitsB1Curves
255000053 / 280
Estimated T-Level: 20.9
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
Factored1999-10-29knut ploder35433FFEFECEA0160Windows,Prime95,v17,(aka WT1)
Factored2001-04-15Marc Getty / Phil Fizur35433FFEFECEA0164783632Windows,Prime95,v19,NT service,(aka WV5)
Factored2015-05-03MadPoo 🙂35433FFEFECEA0164501222Windows 64-bit,Prime95,v26,(aka We4)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
Certified Good
2025-03-26Perig5A3B0B98F810F070132607953
History
DateUserTypeResult
2025-03-26Dr-Picsel DoisCERT
Proof certified good
2025-03-26PerigC-PRPM5461457/664660120921009476805111 : 5A3B0B98F810F070
Proof Certified Good

Proof Power: 7

2025-03-18fordobrF-ECMFactor: 664660120921009476805111 / ECM curve 25, B1=50000, B2=45039225, Edwards Sigma=6536511439514021
2022-07-16Sid & AndyNF-PM1B1=5000000, B2=6418231050
2021-09-25SRBaseNFno factor TF: 71-72
2021-08-23SRBaseNFno factor TF: 70-71
2021-08-19SRBaseNFno factor TF: 69-70
2020-09-14TJAOINFno factor TF: 68-69
2020-05-28KingNF-PM1B1=1000000, B2=22500000
2018-06-29ramgeisNFno factor TF: 67-68
2016-06-29Gordon SpenceNFno factor TF: 66-67
2015-08-24snme2pm1NFno factor TF: 65-66
2015-05-03MadPoo 🙂C-LL35433FFEFECEA016
2014-12-30monstNFno factor TF: 64-65
2014-12-30snme2pm1NFno factor TF: 63-64
2009-05-07GrunwalderGIMPNFno factor TF: 62-63
2004-03-08Sturle SundeNF-PM1B1=70000, B2=1330000, E=6
2001-04-15-anonymous-C-LL35433FFEFECEA016
2000-01-19-anonymous-C-LL35433FFEFECEA016
1999-11-04-anonymous-C-LL35433FFEFECEA016
1999-10-29-anonymous-C-LL35433FFEFECEA016
1999-05-30-anonymous-C-LL35433FFEFECEA016
1999-05-02-anonymous-C-LL35433FFEFECEA016
1999-04-23-anonymous-C-LL35433FFEFECEA016
1999-04-23-anonymous-C-LL35433FFEFECEA016
1999-04-23-anonymous-C-LL35433FFEFECEA016
1998-04-15-anonymous-NFno factor TF: 1-62