Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
5980973Factored
FactorDigitsBitsDate
2133344595893041379288703710730301845055341134.02020-01-02 21:12:02
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-14David LambertE0AE703F9322D3D50
Verified (Factored)2000-12-07Craig EtterE0AE703F9322D3D52530138
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-01-03trebor26A81456986E97731488666653
Verified2020-01-05Alvin Bunk26A81456986E97731458281453
P-1 factors
DateFactorB1B2
2020-01-02213334459589304137928870371073030184505533200007440000
History
DateUserTypeResult
2020-01-05Alvin BunkC-PRP
M5980973/21333445958930413792887037107303018450553 : 26A81456986E9773
PRP: Verified
PRP without proof (not generated)
2020-01-03treborC-PRP
M5980973/21333445958930413792887037107303018450553 : 26A81456986E9773
PRP: Verified
PRP without proof (not generated)
2020-01-02Aaron HavilandF-PM1
Factor: 21333445958930413792887037107303018450553 / (P-1, B1=320000, B2=7440000, e=12, n=324K CUDAPm1 v0.22)
2018-04-11ramgeisNF
no factor from 2^67 to 2^68
2016-06-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-30snme2pm1NF
no factor from 2^65 to 2^66
2014-10-03monstNF
no factor from 2^64 to 2^65
2014-10-02NesowaNF
no factor from 2^63 to 2^64
2010-09-26Squeeky_SquirrelNF-PM1
B1=70000, B2=1155000, E=6
2009-06-12Carsten KossendeyNF-PM1
B1=30000, B2=427500