1 975 957 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
707392607	9	29.4	old
152651874353879	15	47.1	2014-02-26 11:43:24
3073367012242838362127	22	71.4	2021-12-04 20:22:11

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	2D42B339837A385D	2	0	1	3
Verified (Factored)	2017-11-12	Chang Chia-Tche	2D42B339837A385D	2	24096	1	3
Verified	2021-12-08	SRJ2877	FF34A5C0B9A4D8C6	3	215383	5	3

History

Date	User	Type	Result
2022-08-13	USAFSS	NF-PM1	B1=384000, B2=403160940
2021-12-10	LOBES	CERT	PRP Certification Proof certified good
2021-12-08	SRJ2877	C-PRP	M1975957/707392607/152651874353879/3073367012242838362127 : FF34A5C0B9A4D8C6 PRP proof power = 7 PRP: Verified Proof certified good
2021-12-04	Dylan Delgado	F-ECM	Factor: 3073367012242838362127 / (ECM curve 7, B1=50000, B2=6750000, Sigma=557091771746299)
2017-11-12	Chang Chia-Tche	C-PRP	M1975957/707392607/152651874353879 : 2D42B339837A385D PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1975957/707392607/152651874353879 : 2D42B339837A385D PRP: Verified (Factored) PRP without proof (not generated)
2014-02-26	TJAOI	F	Factor: 152651874353879