1 304 707 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
482741591	9	28.8	old
65218500346815896375344607	26	85.8	2018-04-27 11:31:56

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 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	AF1AFBA0598FC90E	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	Oliver Kruse	600E9DF4DEF32EC6	1	0	1	3
Verified (Factored)	2017-10-22	kkmrkkblmbrbk	600E9DF4DEF32EC6	1	1008669	1	3
Verified	2018-04-29	Oliver Kruse	AF1AFBA0598FC90E	2	755725	5	3
Verified	2018-04-29	ATH	AF1AFBA0598FC90E	2	523965	5	3

History

Date	User	Type	Result
2025-09-03	Mark Filipski	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	AF1AFBA0598FC90E PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2018-04-29	ATH	C-PRP	M1304707/482741591/65218500346815896375344607 : AF1AFBA0598FC90E PRP: Verified PRP without proof (not generated)
2018-04-29	Oliver Kruse	C-PRP	M1304707/482741591/65218500346815896375344607 : AF1AFBA0598FC90E PRP: Verified PRP without proof (not generated)
2018-04-27	TJAOI	F-ECM	Factor: 65218500346815896375344607 / (ECM curve 100, B1=50000, B2=5000000)
2017-10-22	kkmrkkblmbrbk	C-PRP	M1304707/482741591 : 600E9DF4DEF32EC6 PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1304707/482741591 : 600E9DF4DEF32EC6 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12