2 084 921 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
562928671	9	29.1	old
398654316375836427337	21	68.4	2022-05-27 15:21:28

ECM

Digits	B1	Curves
25	50000	124 / 280

Estimated T-Level: 22.2 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-06	Oliver Kruse	0F22470678DE7157	1	0	1	3
Verified (Factored)	2017-11-16	Chang Chia-Tche	0F22470678DE7157	1	1394493	1	3
Verified	2022-05-30	SRJ2877	9F81E6517753B33D	2	1435157	5	3

History

Date	User	Type	Result
2022-05-30	curtisc	CERT	PRP Certification Proof certified good
2022-05-30	SRJ2877	C-PRP	M2084921/562928671/398654316375836427337 : 9F81E6517753B33D PRP proof power = 7 PRP: Verified Proof certified good
2022-05-27	debrouxl	F-ECM	Factor: 398654316375836427337 / (ECM curve 3, B1=50000, B2=6450000, Sigma=2545240622575507)
2017-11-16	Chang Chia-Tche	C-PRP	M2084921/562928671 : 0F22470678DE7157 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-06	Oliver Kruse	C-PRP	M2084921/562928671 : 0F22470678DE7157 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12