1 171 979 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
355190940148336871	18	58.3	2007-10-12 07:21:20
7966418689608692635067393	25	82.7	2014-12-27 12:07:12

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		The Grebelius Family	284BDACA1F278CEE	0
Verified (Factored)		Cornelius Caesar	284BDACA1F278CEE	0
Verified (Factored)	2004-10-03	Brian J. Beesley	284BDACA1F278CEE	390638

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-05	Oliver Kruse	D3BD7EC5B527C0D0	2	0	1	3
Verified	2017-10-17	Oliver Kruse	D3BD7EC5B527C0D0	2	127230	1	3
Verified	2018-01-06	ATH	D3BD7EC5B527C0D0	2	252068	1	3

P-1 factors

Date	Factor	B1	B2
2014-12-27	7966418689608692635067393	300000	10000000

History

Date	User	Type	Result
2018-01-06	ATH	C-PRP	M1171979/355190940148336871/7966418689608692635067393 : D3BD7EC5B527C0D0 PRP: Verified PRP without proof (not generated)
2017-10-17	Oliver Kruse	C-PRP	M1171979/355190940148336871/7966418689608692635067393 : D3BD7EC5B527C0D0 PRP: Verified PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1171979/355190940148336871/7966418689608692635067393 : D3BD7EC5B527C0D0 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1171979/355190940148336871/7966418689608692635067393 : D3BD7EC5B527C0D0 PRP without proof (not generated)
2014-12-27	alpertron	F-PM1	Factor: 7966418689608692635067393 / (P-1, B1=300000, B2=10000000, E=12)
2007-10-12	robcreid	F-ECM	Factor: 355190940148336871