18 146 813 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: 3 known prime factors

Trial Factored to 2⁶⁸

TF target 2⁶⁹

Factored

Factor	Digits	Bits	Date
847347286223	12	39.6	old
3701949852001	13	41.8	2008-09-08 14:25:57
1203513740220337366069963463	28	90.0	2026-10-11 04:48:01

P-1 factors

Date	Factors	B1	B2
2026-10-11	1203513740220337366069963463	1000000	608533530

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	Certified Good	2025-06-12	MarkS	E9BAD5FF5AA28961	2	2748891	5	3

History

Date	User	Type	Result
2026-10-11	Sid & Andy	F-PM1	Factor: 1203513740220337366069963463 / B1=1000000, B2=608533530
2025-06-12	David Miller	CERT	Proof certified good
2025-06-12	MarkS	C-PRP	M18146813/847347286223/3701949852001 : E9BAD5FF5AA28961 Proof Certified Good Proof Power: 8
2008-09-08	Will Edgington	F	Factor: 3701949852001