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
1213Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
327511618.3old
71507984186448657279855038902524277323322301354506444504312447163208.82015-04-09 21:21:15
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
65800000000158526 / 194238
Estimated T-Level: 64.1
TF below 2^208 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver KruseCB46A0D10C5CCF952013
Verified2017-10-09Chang Chia-TcheCB46A0D10C5CCF952013
Verified2017-10-12kkmrkkblmbrbkCB46A0D10C5CCF95241413
Verified2017-10-24Chang Chia-TcheCB46A0D10C5CCF95211013
Verified2020-04-17Oliver Kruse23A81A82E1A64133241153
Verified2020-06-08Ahmed Azhad23A81A82E1A64133281953
Verified2023-06-08Valentin Mastro23A81A82E1A64133251453
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-12-21kienvofactor ECM smallC1S116.07 % 2024-12-21
2024-12-138nfactor ECM smallC11S20.00 % 2024-12-21
2024-12-11Jason Lynchfactor ECM smallC17S145.25 % 2024-12-22
2024-12-07mindefactor ECM smallC3S187.83 % 2024-12-22
History
DateUserTypeResult
2024-07-06timc995NF-PM1
B1=1000000000000, B2=409821718586280
2024-05-19mindeF-ECM
Factor: 327511 / (ECM curve 1, B1=900000000, B2=123456789123, Edwards Sigma=2368685656707420)
2024-05-18mindeF-ECM
Factor: 327511 / (ECM curve 1, B1=900000000, B2=321654987321, Edwards Sigma=6607321520319709)
2024-04-21Joe S.NF-PM1
B1=1300000000000, B2=13008116408140583730
2023-06-08Valentin MastroC-PRP
M1213/327511/715079841864486572798550389025242773233223013545064445043124471 : 23A81A82E1A64133
PRP: Verified
PRP without proof (small exponent)
2023-04-11JacobZNF-PP1
Start=6/5, B1=1000000000, B2=221000000000
2022-01-26Ethan O'ConnorNF-PM1
B1=130000000, B2=82524147746040
2021-07-18ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2021-03-27nordiNF-PM1
B1=1000000000000, B2=2232843418649129478
2020-09-21Wentao HuangF-ECM
Factor: 327511 / (ECM curve 1, B1=10000000000, B2=1000000000000)
2020-06-08Ahmed AzhadC-PRP
M1213/327511/715079841864486572798550389025242773233223013545064445043124471 : 23A81A82E1A64133
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1213/327511/715079841864486572798550389025242773233223013545064445043124471 : 23A81A82E1A64133
PRP: Verified
PRP without proof (small exponent)
2019-03-31ANONYMOUSNF-PM1
B1=20000000000, B2=2000000000000, E=12
2019-03-30ANONYMOUSNF-PM1
B1=1000000, B2=100000000, E=12
2017-10-24Chang Chia-TcheC-PRP
M1213/327511/715079841864486572798550389025242773233223013545064445043124471 : CB46A0D10C5CCF95
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M1213/327511/715079841864486572798550389025242773233223013545064445043124471 : CB46A0D10C5CCF95
PRP: Verified
PRP without proof (not generated)
2017-10-09Chang Chia-TcheC-PRP
M1213/known_factors : CB46A0D10C5CCF95
PRP: Verified
PRP without proof (not generated)
2017-09-27Oliver KruseC-PRP
M1213/327511/715079841864486572798550389025242773233223013545064445043124471 : CB46A0D10C5CCF95
PRP: Verified
PRP without proof (not generated)
2017-09-25csabaC-PRP
M1213/known_factors : CB46A0D10C5CCF95
PRP without proof (not generated)
2016-09-10kkmrkkblmbrbkNF-PM1
B1=100000000000, B2=5000000000000, E=12
2016-09-07kkmrkkblmbrbkNF-PM1
B1=1000000000, B2=100000000000, E=12
2016-04-21alexF-ECM
Factor: 327511 / (ECM curve 1, B1=110000000, B2=11000000000)
2015-12-09yatyatlingF-ECM
Factor: 327511 / (ECM curve 1, B1=110000000, B2=11000000000)