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

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MnStatusDetails
1008607Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
4533748981431238.7old
2060410049011193753331832477.42018-01-05 12:38:54
ECM
DigitsB1Curves
2550000280 / 280
30250000152 / 640
Estimated T-Level: 26.2 ⓘ
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01Kriesel6D0B458668D4DD9C013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-28Oliver KruseBF96C524616BC9841013
Verified (Factored)2017-10-15Oliver KruseBF96C524616BC984130261913
Verified (Factored)2017-12-27ATHBF96C524616BC984113758713
Verified2018-01-06AdolfNor6D0B458668D4DD9C224495153
Verified2018-01-08Oliver Kruse6D0B458668D4DD9C224505053
History
DateUserTypeResult
2025-09-01BubaakCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
6D0B458668D4DD9C
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2021-06-19ViliamFNF-PM1
B1=10000000, B2=1000000000
2018-01-08Oliver KruseC-PRP
M1008607/453374898143/206041004901119375333183 : 6D0B458668D4DD9C
PRP: Verified
PRP without proof (not generated)
2018-01-06AdolfNorC-PRP
M1008607/453374898143/206041004901119375333183 : 6D0B458668D4DD9C
PRP: Verified
PRP without proof (not generated)
2018-01-05TJAOIF-ECM
Factor: 206041004901119375333183 / (ECM curve 55, B1=50000, B2=5000000)
2017-12-27ATHC-PRP
M1008607/453374898143 : BF96C524616BC984
PRP: Verified
PRP without proof (not generated)
2017-10-15Oliver KruseC-PRP
M1008607/453374898143 : BF96C524616BC984
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1008607/453374898143 : BF96C524616BC984
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12