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

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Exponent Range:










MnStatusDetails
7207Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
172969617.4old
1510852820972576480715672477.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000002050 / 9201
Estimated T-Level: 41.1
TF below 2^132 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseA8C8ECB188D9E32B2013
Verified2017-10-12kkmrkkblmbrbkA8C8ECB188D9E32B2123613
Verified2020-04-17Oliver Kruse4FC1E4B67EFBE7652294853
Verified2024-02-03Wentao Huang4FC1E4B67EFBE7652252953
History
DateUserTypeResult
2024-02-03Wentao HuangC-PRP
M7207/172969/151085282097257648071567 : 4FC1E4B67EFBE765
PRP: Verified
PRP without proof (small exponent)
2023-08-26-Anonymous-NF-PM1
B1=34000000000, B2=142096338314180250
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M7207/172969/151085282097257648071567 : 4FC1E4B67EFBE765
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M7207/172969/151085282097257648071567 : A8C8ECB188D9E32B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7207/172969/151085282097257648071567 : A8C8ECB188D9E32B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M7207/172969/151085282097257648071567 : A8C8ECB188D9E32B
PRP without proof (not generated)