1 936 817 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 3 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
569424199	9	29.1	old
52283697448053242513	20	65.5	2018-12-19 12:34:17
937942357489369005403489	24	79.6	2022-03-31 09:34:02

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	Type	Base
Verified (Factored)	2025-09-02	Kriesel	78116FB908AF1006	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	alpertron	28DF08EC9D99306D	1	0	1	3
Verified (Factored)	2017-10-20	Oliver Kruse	28DF08EC9D99306D	1	951059	1	3
Verified (Factored)	2018-12-19	Probably_Prime	78116FB908AF1006	2	1744052	5	3
Verified (Factored)	2018-12-20	Chang Chia-Tche	78116FB908AF1006	2	21667	5	3
Verified	2022-04-02	SRJ2877	78116FB908AF1006	3	749906	5	3

History

Date	User	Type	Result
2025-09-03	Carlos Pinho	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	78116FB908AF1006 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2025-06-25	alex4	NF-PM1	B1=7747282, B2=91023182250
2022-04-02	curtisc	CERT	PRP Certification Proof certified good
2022-04-02	SRJ2877	C-PRP	M1936817/569424199/52283697448053242513/937942357489369005403489 : 78116FB908AF1006 PRP proof power = 7 PRP: Verified Proof certified good
2022-03-31	TJAOI	F-ECM	Factor: 937942357489369005403489 / (ECM curve 85, B1=50000, B2=7500000)
2018-12-20	Chang Chia-Tche	C-PRP	M1936817/569424199/52283697448053242513 : 78116FB908AF1006 PRP: Verified (Factored) PRP without proof (not generated)
2018-12-19	Probably_Prime	C-PRP	M1936817/569424199/52283697448053242513 : 78116FB908AF1006 PRP: Verified (Factored) PRP without proof (not generated)
2018-12-19	TJAOI	F	Factor: 52283697448053242513 / TF: 65-66
2017-10-20	Oliver Kruse	C-PRP	M1936817/569424199 : 28DF08EC9D99306D PRP: Verified (Factored) PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1936817/569424199 : 28DF08EC9D99306D PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12