1 705 997 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
2564246558767	13	41.2	old
17880955707811644140377	23	73.9	2020-04-06 09:18:37

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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	1F0B2E07BDAFEEF4	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	alpertron	E2DEB6801D2C1BD2	1	0	1	3
Verified (Factored)	2017-10-18	Oliver Kruse	E2DEB6801D2C1BD2	1	1472594	1	3
Verified	2020-04-06	M Miller	1F0B2E07BDAFEEF4	2	1160741	5	3
Verified	2020-04-07	GAN	1F0B2E07BDAFEEF4	2	21526	5	3

History

Date	User	Type	Result
2025-09-03	Will K	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	1F0B2E07BDAFEEF4 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2021-07-17	Dylan Delgado	NF-PM1	B1=3000000, B2=273000000
2020-04-07	GAN	C-PRP	M1705997/2564246558767/17880955707811644140377 : 1F0B2E07BDAFEEF4 PRP: Verified PRP without proof (not generated)
2020-04-06	M Miller	C-PRP	M1705997/2564246558767/17880955707811644140377 : 1F0B2E07BDAFEEF4 PRP: Verified PRP without proof (not generated)
2020-04-06	TJAOI	F-ECM	Factor: 17880955707811644140377 / (ECM curve 83, B1=50000, B2=5000000)
2017-10-18	Oliver Kruse	C-PRP	M1705997/2564246558767 : E2DEB6801D2C1BD2 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1705997/2564246558767 : E2DEB6801D2C1BD2 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12