1 858 583 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
1978341647702113679	19	60.8	2009-07-20 15:23:32
10171611024230424658961	23	73.1	2021-02-11 17:39:14

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)		phil kenny	179CE6ADFE0B314E	0
Verified (Factored)	1998-12-13	Gary Untermeyer	179CE6ADFE0B314E	425479

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	5C13F998EA93F4C7	1	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	5C13F998EA93F4C7	1	1371713	1	3
Verified	2021-02-11	riccardo uberti	43C41451552960C0	2	906312	5	3

History

Date	User	Type	Result
2021-02-11	Ben Delo	CERT	PRP Certification Proof certified good
2021-02-11	riccardo uberti	C-PRP	M1858583/1978341647702113679/10171611024230424658961 : 43C41451552960C0 PRP proof power = 7 PRP: Verified Proof certified good
2021-02-11	_p95holder_	F-ECM	Factor: 10171611024230424658961 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1858583/1978341647702113679 : 5C13F998EA93F4C7 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1858583/1978341647702113679 : 5C13F998EA93F4C7 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-07-20	James Hintz	F-ECM	Factor: 1978341647702113679