Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
9619
Composite, with 4 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
615617619.2old
17256487824.0old
538406980331135.6old
27953068701899034231961.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000006736 / 16550
Estimated T-Level: 47.0
TF below 2^151 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver KruseD0F867396C2FC36A4013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbkD0F867396C2FC36A4013
Verified
No proof (small exponent)
2017-12-07ATHD0F867396C2FC36A4803013
Verified
No proof (small exponent)
2020-04-17Oliver Kruse4A115EE72234EF8B4871153
Verified
No proof (small exponent)
2024-07-01kkmrkkblmbrbk4A115EE72234EF8B4920053
History
DateUserTypeResult
2025-03-28masserNF-PP1Start=141/71, B1=1000000000, B2=999000000000
2024-07-01kkmrkkblmbrbkC-PRPM9619/17256487/2795306870189903423/53840698033/615617 : 4A115EE72234EF8B
2023-06-25JacobZNF-PM1B1=60000000000, B2=244568457101868900
2022-01-03ANONYMOUSNF-PM1B1=100000000
2020-04-17Oliver KruseC-PRPM9619/615617/17256487/53840698033/2795306870189903423 : 4A115EE72234EF8B
2017-12-07ATHC-PRPM9619/615617/17256487/53840698033/2795306870189903423 : D0F867396C2FC36A
2017-10-02kkmrkkblmbrbkC-PRPM9619/615617/17256487/53840698033/2795306870189903423 : D0F867396C2FC36A
2017-09-21Oliver KruseC-PRPM9619/known_factors : D0F867396C2FC36A