1 234 577 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 2⁶⁰

Factored

Factor	Digits	Bits	Date
17284079	8	24.0	old
110381060417	12	36.7	2008-07-15 09:57:01

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	104 / 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	Software
Factored	2004-09-02	Thomas Hertz	E8A49805FFAAA61E	3845	Windows,Prime95,v23,(aka WZ1)
Factored	2005-04-02	Andrew Mueller	E8A49805FFAAA61E	1086582	Windows,Prime95,v23,(aka WZ1)

Status	Proof	Date	User	Residue	Shift	Type	Base
Factored	Certified Good Power=6	2025-09-01	Kriesel	F61B1AF6F972ED3F	0	1	3

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-09-29	Oliver Kruse	476D4CDB5B80C33E	2	0	1	3
Verified	PRP without proof (not generated)	2017-10-19	kkmrkkblmbrbk	476D4CDB5B80C33E	2	302631	1	3

History

Date	User	Type	Result
2026-03-04	trebor	NF-PM1	B1=25000000
2025-09-02	Chuck	CERT	Proof certified good
2025-09-01	Kriesel	C-PRP	F61B1AF6F972ED3F Proof Certified Good Proof Power: 6
2017-10-19	kkmrkkblmbrbk	C-PRP	M1234577/17284079/110381060417 : 476D4CDB5B80C33E
2017-09-29	Oliver Kruse	C-PRP	M1234577/17284079/110381060417 : 476D4CDB5B80C33E
2016-03-17	alpertron	NF-PM1	B1=300000, B2=10000000, E=12
2008-07-15	J Feitsma	F	Factor: 110381060417
2005-04-02	-anonymous-	C-LL	E8A49805FFAAA61E
2004-09-14	-anonymous-	C-LL	E8A49805FFAAA61E
2004-09-02	-anonymous-	C-LL	E8A49805FFAAA61E