1 970 237 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
204543220265402719	18	57.5	old
8031134794992052309746727	25	82.7	2021-12-08 07:51:40

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	58 / 640

Estimated T-Level: 25.5 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Guy Paquet	626D71E51B834382	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	AA55A7A90CD8A44C	1	0	1	3
Verified (Factored)	2017-11-12	kkmrkkblmbrbk	AA55A7A90CD8A44C	1	839627	1	3
Verified	2021-12-08	MarkS	79479689764BAE00	2	561217	5	3

History

Date	User	Type	Result
2023-10-16	USAFSS	NF-PM1	B1=672000, B2=647447724
2022-08-12	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-12-09	irowiki	CERT	PRP Certification Proof certified good
2021-12-08	MarkS	C-PRP	M1970237/204543220265402719/8031134794992052309746727 : 79479689764BAE00 PRP proof power = 7 PRP: Verified Proof certified good
2021-12-08	MarkS	F-ECM	Factor: 8031134794992052309746727 / (ECM curve 6, B1=50000, B2=5000000, Sigma=392836399354988)
2017-11-12	kkmrkkblmbrbk	C-PRP	M1970237/204543220265402719 : AA55A7A90CD8A44C PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1970237/204543220265402719 : AA55A7A90CD8A44C PRP: Verified (Factored) PRP without proof (not generated)