1 968 599 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
745781008302646442239	21	69.3	2011-04-20 09:41:12
5597582713414701024823	22	72.2	2021-02-28 14:00:22

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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)		Colin Plumb	FFB7966A0F0FE19E	0
Verified (Factored)	1999-01-10	David Phillips	FFB7966A0F0FE19E	1078946

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	D3E4E142744F1291	1	0	1	3
Verified (Factored)	2017-11-12	kkmrkkblmbrbk	D3E4E142744F1291	1	845063	1	3
Verified	2021-02-28	riccardo uberti	5ED09E5267E7C87B	2	1134813	5	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2021-02-28	riccardo uberti	NF-PM1	B1=3000000, B2=90000000, E=12
2021-02-28	curtisc	CERT	PRP Certification Proof certified good
2021-02-28	riccardo uberti	C-PRP	M1968599/745781008302646442239/5597582713414701024823 : 5ED09E5267E7C87B PRP proof power = 7 PRP: Verified Proof certified good
2021-02-28	Poao	F-ECM	Factor: 5597582713414701024823 / (ECM curve 3, B1=50000, B2=5000000, Sigma=262568365951305)
2017-11-12	kkmrkkblmbrbk	C-PRP	M1968599/745781008302646442239 : D3E4E142744F1291 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1968599/745781008302646442239 : D3E4E142744F1291 PRP: Verified (Factored) PRP without proof (not generated)
2011-04-20	kurly	F-PM1	Factor: 745781008302646442239
2010-01-03	S485122	NF	no factor from 2^60 to 2^61