1 075 441 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
23659703	8	24.5	old
59897390967043757134081	23	75.7	2017-03-24 13:19:16

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 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)	2025-09-01	Kriesel	7A723E7D46CDEF77	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	Oliver Kruse	7C56C78A10BE62E8	2	0	1	3
Verified	2017-10-16	Oliver Kruse	7C56C78A10BE62E8	2	905771	1	3
Verified	2018-01-01	ATH	7C56C78A10BE62E8	2	617345	1	3

History

Date	User	Type	Result
2025-09-01	o-jill	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	7A723E7D46CDEF77 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2024-08-22	cramsey87	NF-PM1	B1=3000000, B2=22221719520
2018-01-01	ATH	C-PRP	M1075441/23659703/59897390967043757134081 : 7C56C78A10BE62E8 PRP: Verified PRP without proof (not generated)
2017-10-16	Oliver Kruse	C-PRP	M1075441/23659703/59897390967043757134081 : 7C56C78A10BE62E8 PRP: Verified PRP without proof (not generated)
2017-09-28	Oliver Kruse	C-PRP	M1075441/23659703/59897390967043757134081 : 7C56C78A10BE62E8 PRP: Verified PRP without proof (not generated)
2017-03-24	TJAOI	F-ECM	Factor: 59897390967043757134081 / (ECM curve 42, B1=50000, B2=5000000)