4 983 613 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
656640848881	12	39.3	old
76515509403230377217	20	66.1	2019-08-28 22:33:29

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-20	kkmrkkblmbrbk	5957A56FEF762DF9	1	0	1	3
Verified (Factored)	2018-04-23	Chang Chia-Tche	5957A56FEF762DF9	1	4948994	1	3
Verified	2019-08-31	fre_games	3FDF2A309B434636	2	883457	5	3
Verified	2019-08-31	ATH	3FDF2A309B434636	2	1571244	5	3

History

Date	User	Type	Result
2023-12-12	USAFSS	NF-PM1	B1=256000, B2=105522060
2019-08-31	ATH	C-PRP	M4983613/656640848881/76515509403230377217 : 3FDF2A309B434636 PRP: Verified PRP without proof (not generated)
2019-08-31	fre_games	C-PRP	M4983613/656640848881/76515509403230377217 : 3FDF2A309B434636 PRP: Verified PRP without proof (not generated)
2019-08-28	MarkS	F-ECM	Factor: 76515509403230377217 / (ECM curve 3, B1=50000, B2=5000000)
2018-04-23	Chang Chia-Tche	C-PRP	M4983613/656640848881 : 5957A56FEF762DF9 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4983613/656640848881 : 5957A56FEF762DF9 PRP: Verified PRP without proof (not generated)