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

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MnStatusDetails
2663651Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
5327303722.3old
4880288089191238.82008-09-07 19:40:45
58528989426231342.42008-09-07 19:40:45
1015996717498458267213612476.42025-09-14 07:33:08
ECM
DigitsB1Curves
255000098 / 280
Estimated T-Level: 21.8 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-18Oliver Kruse8993D5E4C566A2FD3257251553
Verified (Factored)2017-12-03kkmrkkblmbrbk8993D5E4C566A2FD348765953
Verified2025-09-14Clara Oswald8993D5E4C566A2FD428223453
History
DateUserTypeResult
2025-09-14Michel YamagishiCERT
PRP Certification
Proof certified good
2025-09-14Clara OswaldC-PRP
M2663651/5327303/488028808919/5852898942623/101599671749845826721361 : 8993D5E4C566A2FD
PRP proof power = 7
PRP: Verified
Proof certified good
2025-09-14Clara OswaldF-ECM
Factor: 101599671749845826721361 / (ECM curve 17, B1=65296, B2=60054225, Edwards Sigma=686462067804630)
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-12-03kkmrkkblmbrbkC-PRP
M2663651/5327303/488028808919/5852898942623 : 8993D5E4C566A2FD
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-18Oliver KruseC-PRP
M2663651/5327303/488028808919/5852898942623 : 8993D5E4C566A2FD
PRP: Verified (Factored)
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 5852898942623
2008-09-07Will EdgingtonF
Factor: 488028808919