1 806 269 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
348989279620260839233591	24	78.2	2020-12-08 09:01:26

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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
Verified (Factored)		Ivor Horton	147F010B52165AFD	0
Verified (Factored)	1998-12-21	Bill Dodd	147F010B52165AFD	514634
Verified (Factored)	2015-07-18	MadPoo	147F010B52165AFD	1582264

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-12-08	riccardo uberti	0F0BEBA869C43801	1	745964	5	3

History

Date	User	Type	Result
2020-12-08	ZFR	CERT	PRP Certification Proof certified good
2020-12-08	riccardo uberti	C-PRP	M1806269/348989279620260839233591 : 0F0BEBA869C43801 PRP proof power = 7 PRP: Verified Proof certified good
2020-12-08	daveward2005	F-ECM	Factor: 348989279620260839233591 / (ECM curve 1, B1=50000, B2=5000000, Sigma=1451158217928566)
2019-06-24	TJAOI	NF	no factor from 2^67 to 2^68
2018-09-19	Joss	NF-PM1	B1=1806269, B2=180626900, E=12
2018-05-14	TJAOI	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-09-01	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-18	MadPoo	C-LL	147F010B52165AFD
2015-05-05	mikr	NF-PM1	B1=2780000, B2=91760000, E=12
2015-04-20	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-20	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-20	Joss	NF-PM1	B1=171068
2014-05-12	Joss	NF-PM1	B1=135534
2011-02-09	Carsten Kossendey	NF-PM1	B1=100000, B2=1650000, E=6
2010-12-13	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-11	Architects Cubed	NF	no factor from 2^60 to 2^61