Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
15122501Factored
FactorDigitsBitsDate
1941718478357070493070213149208479977549405531271350163.72022-03-13 15:59:32
ECM
DigitsB1Curves
255000014 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-05-05Russ Jorgensen22168DC258E19EE612572731
Verified (Factored)2005-09-22Marc Getty / Phil Fizur22168DC258E19EE62461534
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-11-10Naegi Makoto4825799101409E8D1727673553
P-1 factors
DateFactorB1B2
2022-03-131941718478357070493070213149208479977549405531271315000004336061730
History
DateUserTypeResult
2022-11-10Chad Steenerson CERT
PRP Certification
Proof certified good
2022-11-10Naegi MakotoC-PRP
M15122501/19417184783570704930702131492084799775494055312713 : 4825799101409E8D
PRP proof power = 8
PRP: Verified
Proof certified good
2022-03-13LuminescenceF-PM1
Factor: 19417184783570704930702131492084799775494055312713 / (P-1, B1=1500000, B2=4336061730)
2021-10-15-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-02SRBaseNF
no factor from 2^70 to 2^71
2021-06-28lycornNF
no factor from 2^69 to 2^70
2018-03-24riccardo ubertiNF-PM1
B1=430000, B2=9000000, E=12
2017-10-10ramgeisNF
no factor from 2^68 to 2^69
2016-12-22mikrNF
no factor from 2^67 to 2^68
2014-05-14NesowaNF
no factor from 2^66 to 2^67
2013-09-16David CampeauNF
no factor from 2^65 to 2^66