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:










MnStatusDetails
15607Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
486506947680592228900186828092995.3old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000001263 / 9201
Estimated T-Level: 40.7
TF below 2^130 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseA2E051DA9E4440761013
Verified2017-10-12kkmrkkblmbrbkA2E051DA9E4440761879813
Verified2020-04-17Oliver KruseFE638977A71270A31305253
Verified2024-07-01kkmrkkblmbrbkFE638977A71270A311399053
History
DateUserTypeResult
2025-01-09masserNF-PP1
Start=6/5, B1=180000000, B2=179820000000
2024-12-27masserNF-PP1
Start=160/37, B1=180000000, B2=179820000000
2024-12-12masserNF-PP1
Start=2/7, B1=180000000, B2=179820000000
2024-07-01kkmrkkblmbrbkC-PRP
M15607/48650694768059222890018682809 : FE638977A71270A3
PRP: Verified
PRP without proof (small exponent)
2024-05-21Anton RepkoNF-PM1
B1=100000000000, B2=120417199046794650
2023-05-29JacobZNF-PM1
B1=6900000000, B2=29520458628010350
2020-04-17Oliver KruseC-PRP
M15607/48650694768059222890018682809 : FE638977A71270A3
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M15607/48650694768059222890018682809 : A2E051DA9E444076
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M15607/48650694768059222890018682809 : A2E051DA9E444076
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M15607/48650694768059222890018682809 : A2E051DA9E444076
PRP without proof (not generated)