1 978 201 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
25859043473	11	34.6	old
10974490874492107494075617	26	83.2	2015-10-11 13:25:56

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	58 / 640

Estimated T-Level: 25.5 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	627C68233E8D7AD3	2	0	1	3
Verified	2017-10-20	Oliver Kruse	627C68233E8D7AD3	2	1246708	1	3

P-1 factors

Date	Factor	B1	B2
2015-10-11	10974490874492107494075617	500000	15000000

History

Date	User	Type	Result
2017-10-20	Oliver Kruse	C-PRP	M1978201/25859043473/10974490874492107494075617 : 627C68233E8D7AD3 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1978201/25859043473/10974490874492107494075617 : 627C68233E8D7AD3 PRP: Verified PRP without proof (not generated)
2015-10-11	alpertron	F-PM1	Factor: 10974490874492107494075617 / (P-1, B1=500000, B2=15000000, E=12)