1 625 989 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
667107514943	12	39.3	old
3055107562828863943	19	61.4	2015-05-02 17:25:46

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	134 / 640

Estimated T-Level: 26.0 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-02	Oliver Kruse	83E696E85482034A	2	0	1	3
Verified	2017-11-01	kkmrkkblmbrbk	83E696E85482034A	2	844562	1	3

P-1 factors

Date	Factor	B1	B2
2015-05-02	3055107562828863943	500000	15000000

History

Date	User	Type	Result
2017-11-01	kkmrkkblmbrbk	C-PRP	M1625989/667107514943/3055107562828863943 : 83E696E85482034A PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1625989/667107514943/3055107562828863943 : 83E696E85482034A PRP: Verified PRP without proof (not generated)
2015-05-02	alpertron	F-PM1	Factor: 3055107562828863943 / (P-1, B1=500000, B2=15000000, E=12)