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

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MnStatusDetails
2617Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
78511516.3old
2213983721.1old
5985324867568731549.1old
42890397181356087562032562825266600726313154769748158.22014-05-27 20:44:32
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
551100000008762 / 40830
Estimated T-Level: 51.1
TF below 2^165 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseF55FE749AA2A820A4013
Verified2017-10-02kkmrkkblmbrbkF55FE749AA2A820A4013
Verified2017-12-07ATHF55FE749AA2A820A4112413
Verified2020-04-17Oliver Kruse5A82BEA293DBCF8C463253
Verified2024-02-03Wentao Huang5A82BEA293DBCF8C452153
History
DateUserTypeResult
2024-05-30masserNF-PM1
B1=100000000000, B2=262663502299027830
2024-02-03Wentao HuangC-PRP
M2617/78511/2213983/598532486756873/428903971813560875620325628252666007263131547697 : 5A82BEA293DBCF8C
PRP: Verified
PRP without proof (small exponent)
2021-07-05ViliamFNF-PM1
B1=1000000000, B2=191000000000
2020-04-17Oliver KruseC-PRP
M2617/78511/2213983/598532486756873/428903971813560875620325628252666007263131547697 : 5A82BEA293DBCF8C
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M2617/78511/2213983/598532486756873/428903971813560875620325628252666007263131547697 : F55FE749AA2A820A
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M2617/78511/2213983/598532486756873/428903971813560875620325628252666007263131547697 : F55FE749AA2A820A
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M2617/known_factors : F55FE749AA2A820A
PRP without proof (not generated)
2014-05-27Matthias WurtingerF-ECM
Factor: 428903971813560875620325628252666007263131547697 / (ECM curve 147, B1=110000000, B2=11000000000)