12 288 439 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
6434018638883403597503	22	72.4	2016-03-11 11:58:03

ECM

Digits	B1	Curves
25	50000	1 / 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	Shift
Verified (Factored)	2002-02-24	Mikhailov Andrey	8B6D0021540877F7	2714427
Verified (Factored)	2004-08-06	Peter D	8B6D0021540877F7	8842220

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-02-26	Poao	8298728F3CEB8D4B	1	7347538	5	3

History

Date	User	Type	Result
2022-02-26	Schultz7676	CERT	PRP Certification Proof certified good
2022-02-26	Poao	C-PRP	M12288439/6434018638883403597503 : 8298728F3CEB8D4B PRP proof power = 8 PRP: Verified Proof certified good
2022-02-22	nordi	NF-PM1	B1=400000, B2=303696120
2022-02-08	nordi	NF-PM1	B1=400000
2016-03-11	bam	F-ECM	Factor: 6434018638883403597503 / (ECM curve 1, B1=50000, B2=5000000)
2015-07-25	Tha	NF	no factor from 2^67 to 2^68
2015-03-07	Tha	NF	no factor from 2^66 to 2^67
2013-09-29	Nesowa	NF	no factor from 2^65 to 2^66
2013-08-03	lycorn	NF	no factor from 2^64 to 2^65