10 380 959 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶⁸

Factored

Factor	Digits	Bits	Date
20761919	8	24.3	old
186556371267359964929	21	67.3	2022-05-09 10:32:30

ECM

Digits	B1	Curves
25	50000	13 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	PRP without proof (not generated)	2020-05-17	riccardo uberti	552CD26A4BC9381C	1	7067663	5	3
Factored	Certified Good	2021-02-26	rucio	552CD26A4BC9381C	1	4365892	5	3
Verified	Certified Good	2022-05-16	George Woltman	552CD26A4BC9381C	2	1143271	5	3

History

Date	User	Type	Result
2026-01-05	Sid & Andy	NF-PM1	B1=1700000, B2=1975096200
2022-05-16	bernardo_s	CERT	Proof certified good
2022-05-16	George Woltman	C-PRP	M10380959/20761919/186556371267359964929 : 552CD26A4BC9381C Proof Certified Good Proof Power: 8
2022-05-09	TJAOI	F	Factor: 186556371267359964929
2021-02-26	Ben Delo	CERT	Proof certified good
2021-02-26	rucio	C-PRP	M10380959/20761919 : 552CD26A4BC9381C Proof Certified Good Proof Power: 8
2020-05-17	riccardo uberti	C-PRP	M10380959/20761919 : 552CD26A4BC9381C