1 468 499 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 3 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
152723897	9	27.2	old
125678643900937	15	46.8	2014-02-20 11:36:12
18450207554960336537	20	64.0	2017-06-22 11:18:37

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	35A0C4AF3C9A3EBB	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	alpertron	554B57C38B571E30	3	0	1	3
Verified	2017-10-18	Oliver Kruse	554B57C38B571E30	3	819071	1	3

History

Date	User	Type	Result
2025-09-03	Carlos Pinho	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	35A0C4AF3C9A3EBB PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2017-10-18	Oliver Kruse	C-PRP	M1468499/152723897/125678643900937/18450207554960336537 : 554B57C38B571E30 PRP: Verified PRP without proof (not generated)
2017-09-28	alpertron	C-PRP	M1468499/125678643900937/152723897/18450207554960336537 : 554B57C38B571E30 PRP: Verified PRP without proof (not generated)
2017-06-22	TJAOI	F	Factor: 18450207554960336537 / TF: 64-65
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2014-02-20	TJAOI	F	Factor: 125678643900937