2 235 971 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
40247479	8	25.3	old
721662804738425448601361	24	79.3	2022-10-20 06:04:35

ECM

Digits	B1	Curves
25	50000	87 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-09	Oliver Kruse	4CD99A061BF4D23F	1	0	1	3
Verified (Factored)	2017-11-20	kkmrkkblmbrbk	4CD99A061BF4D23F	1	501767	1	3
Verified	2022-10-20	Kevin_9611	433CC03C05085200	2	127434	5	3

History

Date	User	Type	Result
2022-10-20	curtisc	CERT	PRP Certification Proof certified good
2022-10-20	Kevin_9611	C-PRP	M2235971/40247479/721662804738425448601361 : 433CC03C05085200 PRP proof power = 7 PRP: Verified Proof certified good
2022-10-20	debrouxl	F-ECM	Factor: 721662804738425448601361 / (ECM curve 6, B1=50000, B2=5900000, Sigma=4929119862772929)
2017-11-20	kkmrkkblmbrbk	C-PRP	M2235971/40247479 : 4CD99A061BF4D23F PRP: Verified (Factored) PRP without proof (not generated)
2017-10-09	Oliver Kruse	C-PRP	M2235971/40247479 : 4CD99A061BF4D23F PRP: Verified (Factored) PRP without proof (not generated)
2016-04-18	alpertron	NF-PM1	B1=500000, B2=15000000, E=12