1 677 523 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 4 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
40260553	8	25.3	old
20789657187098459687	20	64.2	2017-08-03 11:32:15
833366950284664189168543	24	79.5	2020-01-06 12:25:19
100452412163268287912016246017	30	96.3	2022-11-14 11:35:29

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	48399F820B3097F8	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-28	alpertron	BFD7891E77E14CC3	2	0	1	3
Verified (Factored)	2017-10-18	Oliver Kruse	BFD7891E77E14CC3	2	1254661	1	3
Verified (Factored)	2020-01-09	Sébastien BROUCKE	48399F820B3097F8	3	157576	5	3
Verified (Factored)	2020-01-10	marssystems	48399F820B3097F8	3	33887	5	3
Verified	2022-11-15	LordJulius	48399F820B3097F8	4	3904	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	48399F820B3097F8 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2022-11-15	Gufesa	CERT	PRP Certification Proof certified good
2022-11-15	LordJulius	C-PRP	M1677523/40260553/20789657187098459687/833366950284664189168543/100452412163268287912016246017 : 48399F820B3097F8 PRP proof power = 6 PRP: Verified Proof certified good
2022-11-14	TJAOI	F-ECM	Factor: 100452412163268287912016246017 / (ECM curve 29, B1=250000, B2=40000000)
2020-01-10	marssystems	C-PRP	M1677523/40260553/20789657187098459687/833366950284664189168543 : 48399F820B3097F8 PRP: Verified (Factored) PRP without proof (not generated)
2020-01-09	Sébastien BROUCKE	C-PRP	M1677523/40260553/20789657187098459687/833366950284664189168543 : 48399F820B3097F8 PRP: Verified (Factored) PRP without proof (not generated)
2020-01-06	TJAOI	F-ECM	Factor: 833366950284664189168543 / (ECM curve 35, B1=50000, B2=5000000)
2017-10-18	Oliver Kruse	C-PRP	M1677523/40260553/20789657187098459687 : BFD7891E77E14CC3 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-28	alpertron	C-PRP	M1677523/20789657187098459687/40260553 : BFD7891E77E14CC3 PRP: Verified (Factored) PRP without proof (not generated)
2017-08-03	TJAOI	F	Factor: 20789657187098459687 / TF: 64-65
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12