15 729 877 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1571891061046064113	19	60.4	old
829427301668260451521	21	69.5	2021-08-10 06:56:34
1373434287880125053081951	25	80.2	2023-08-23 02:20:38

ECM

Digits	B1	Curves
25	50000	0 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^61 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-09-23	Funky Waddle	EEC248CD41A261D4	3	2875201	5	3

P-1 factors

Date	Factor	B1	B2
2023-08-23	1373434287880125053081951	480000	264402600

History

Date	User	Type	Result
2023-09-23	mrk74	CERT	PRP Certification Proof certified good
2023-09-23	Funky Waddle	C-PRP	M15729877/1571891061046064113/829427301668260451521/1373434287880125053081951 : EEC248CD41A261D4 PRP proof power = 8 PRP: Verified Proof certified good
2023-08-23	nordi	F-PM1	Factor: 1373434287880125053081951 / (P-1, B1=480000, B2=264402600)
2023-08-01	nordi	NF-PM1	B1=480000
2021-08-10	ATH	F-PP1	Start=2/7, B1=100000, Factor: 829427301668260451521