1 970 641 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
50606060881	11	35.6	old
713267393080337	15	49.3	2008-08-26 20:20:25
4287595336237305047887	22	71.9	2021-12-16 03:54:03

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	56 / 640

Estimated T-Level: 25.4 ⓘ

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 (Factored)	2017-10-05	Oliver Kruse	EF7F1795D798F4FE	2	0	1	3
Verified (Factored)	2017-11-12	kkmrkkblmbrbk	EF7F1795D798F4FE	2	159135	1	3
Verified	2021-12-16	SRJ2877	0730EB3FB3C94674	3	1592294	5	3

History

Date	User	Type	Result
2023-10-16	USAFSS	NF-PM1	B1=960000, B2=979475574
2022-08-12	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-12-16	Jackeh	CERT	PRP Certification Proof certified good
2021-12-16	SRJ2877	C-PRP	M1970641/50606060881/713267393080337/4287595336237305047887 : 0730EB3FB3C94674 PRP proof power = 7 PRP: Verified Proof certified good
2021-12-16	_p95holder_	F-ECM	Factor: 4287595336237305047887 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-12	kkmrkkblmbrbk	C-PRP	M1970641/50606060881/713267393080337 : EF7F1795D798F4FE PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1970641/50606060881/713267393080337 : EF7F1795D798F4FE PRP: Verified (Factored) PRP without proof (not generated)
2008-08-26	-Anonymous-	F	Factor: 713267393080337