2 306 519 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
393188012956067415407864504162916357919	39	128.2	2017-12-21 16:09:29

ECM

Digits	B1	Curves
25	50000	97 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ethan Hansen	017803214DB15B6C	0
Verified (Factored)	1999-04-02	John Palm	017803214DB15B6C	1583758

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-23	Chun sung soo	2139694329D84C44	1	819657	5	3
Verified	2017-12-23	ATH	2139694329D84C44	1	1911868	5	3
Verified	2017-12-23	BloodERazor	2139694329D84C44	1	608274	5	3

P-1 factors

Date	Factor	B1	B2
2017-12-21	393188012956067415407864504162916357919	6000000	180000000

History

Date	User	Type	Result
2018-02-19	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2017-12-23	BloodERazor	C-PRP	M2306519/393188012956067415407864504162916357919 : 2139694329D84C44 PRP: Verified PRP without proof (not generated)
2017-12-23	ATH	C-PRP	M2306519/393188012956067415407864504162916357919 : 2139694329D84C44 PRP: Verified PRP without proof (not generated)
2017-12-23	Chun sung soo	C-PRP	M2306519/393188012956067415407864504162916357919 : 2139694329D84C44 PRP: Verified PRP without proof (not generated)
2017-12-21	Sid & Andy	F-PM1	Factor: 393188012956067415407864504162916357919 / (P-1, B1=6000000, B2=180000000, E=12)
2017-05-30	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-10-22	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-03	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-03	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-13	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-02-12	Bud	NF-PM1	B1=500000, B2=10000000, E=12
2009-01-15	Sturle Sunde	NF	no factor from 2^60 to 2^61