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
1663Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
16631514.0old
6013409722.5old
59585821261991342.4old
23434013820725989360351942328829733107.5old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
65800000000158507 / 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
Verified2017-09-21Oliver Kruse5D0711F2C0B0F3E14013
Verified2017-10-02kkmrkkblmbrbk5D0711F2C0B0F3E14013
Verified2017-12-07ATH5D0711F2C0B0F3E14162513
Verified2020-04-17Oliver Kruse103BC2BB744C2644444353
Verified2020-08-12_p95holder_103BC2BB744C26444130353
P-1 factors
DateFactorB1B2
2024-05-025959118701226744099647215000050000
History
DateUserTypeResult
2024-05-02JuanTutorsF-PM1
Factors: 16631,6013409,5958582126199 / (P-1, B1=50000)
2024-03-02masserNF-PM1
B1=250000000000, B2=378945708521480100
2021-07-22ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2020-08-12_p95holder_C-PRP
M1663/16631/6013409/5958582126199/234340138207259893603519423288297 : 103BC2BB744C2644
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1663/16631/6013409/5958582126199/234340138207259893603519423288297 : 103BC2BB744C2644
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M1663/16631/6013409/5958582126199/234340138207259893603519423288297 : 5D0711F2C0B0F3E1
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M1663/16631/6013409/5958582126199/234340138207259893603519423288297 : 5D0711F2C0B0F3E1
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1663/known_factors : 5D0711F2C0B0F3E1
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=1000000000, B2=100000000000, E=12