2 273 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^220 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	6000000000000
B2 =	9223372036854775807

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	194238 / 194238
70	2400000000	194465 / 350860

Estimated T-Level: 67.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	23B1	0
Verified		George Woltman	942DECBBF9EE23B1	0
Verified		Brian J. Beesley	942DECBBF9EE23B1	0
Verified	2015-04-11	MadPoo	942DECBBF9EE23B1	136

History

Date	User	Type	Result
2024-10-18	-Anonymous-	NF-PM1	B1=6000000000000, B2=14001161951512335600
2023-08-10	masser	NF-PP1	Start=6/5, B1=4390000000, B2=785810000000
2023-07-03	masser	NF-PM1	B1=216000000000, B2=522616969739985120
2023-06-28	masser	NF-PP1	Start=131/13, B1=4390000000, B2=4385610000000
2022-04-10	Anton Repko	NF	no factor from 2^64 to 2^66
2021-05-12	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2020-12-31	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2017-12-08	snme2pm1	NF	no factor from 2^63 to 2^64
2017-02-10	James Hintz	NF-PM1	B1=3106063887077, B2=248485110966160, E=12
2016-09-01	snme2pm1	NF	no factor from 2^62 to 2^63
2015-07-09	MadPoo	NF-PM1	B1=1663924739107, B2=10000000000000, E=12
2015-05-04	snme2pm1	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	942DECBBF9EE23B1
2014-12-18	James Hintz	NF-PM1	B1=100000000000, B2=10000000000000, E=12
2012-04-16	bcp19	NF	no factor from 2^60 to 2^61
2011-05-20	Joss	NF-PM1	B1=20000000000
2010-12-17	monst	NF	no factor from 2^59 to 2^60
2009-08-07	James Hintz	NF-PM1	B1=10000000000, B2=200000000000, E=12
2009-07-11	abc	NF	no factor to 2^59