2 081 861 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
29523275062262608411429632439	29	94.6	2015-12-18 06:17:26

ECM

Digits	B1	Curves
25	50000	107 / 280

Estimated T-Level: 21.9 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ken Kriesel	675CDF2C833CB4A3	0
Verified (Factored)		Fred Otto	675CDF2C833CB4A3	0
Verified (Factored)	2015-11-14	MadPoo	675CDF2C833CB4A3	223125

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	CFC97E4128651586	1	0	1	3
Verified	2017-10-21	Oliver Kruse	CFC97E4128651586	1	337137	1	3

History

Date	User	Type	Result
2017-10-21	Oliver Kruse	C-PRP	M2081861/29523275062262608411429632439 : CFC97E4128651586 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2081861/29523275062262608411429632439 : CFC97E4128651586 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-18	guru	F-ECM	Factor: 29523275062262608411429632439 / (ECM curve 1, B1=50000, B2=5000000)
2015-11-14	MadPoo	C-LL	675CDF2C833CB4A3
2015-11-05	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-31	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-31	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-02	ramgeis	NF	no factor from 2^62 to 2^63
2012-03-17	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-24	James Heinrich	NF-PM1	B1=135000, B2=2936250, E=6
2011-01-07	Joss	NF-PM1	B1=50000
2010-12-28	Joss	NF-PM1	B1=30000
2009-07-26	USAFSS	NF-PM1	B1=20000, B2=260000
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61