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

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MnStatusDetails
2521327Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
133367781012302914732063.5old
ECM
DigitsB1Curves
2550000148 / 280
Estimated T-Level: 22.6
TF below 2^70 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Richard Workman8436ABE7300C1CA40
Verified (Factored)1999-04-02Phil Brett8436ABE7300C1CA415023
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-14Oliver KruseD3C0242A80F196DF178527553
Verified2017-11-30storm5510D3C0242A80F196DF149235853
History
DateUserTypeResult
2023-01-25USAFSSNF-PM1
B1=226000, B2=238697550
2017-11-30storm5510C-PRP
M2521327/13336778101230291473 : D3C0242A80F196DF
PRP: Verified
PRP without proof (not generated)
2017-10-14Oliver KruseC-PRP
M2521327/13336778101230291473 : D3C0242A80F196DF
PRP: Verified
PRP without proof (not generated)