8 581 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

TF

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^166 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	68000000000
B2 =	265422648792401100

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	13093 / 40830

Estimated T-Level: 51.6 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	1F83	0
Verified		George Woltman	7360AF4407EB1F83	0
Verified		Brian J. Beesley	7360AF4407EB1F83	0
Verified	2015-04-11	MadPoo	7360AF4407EB1F83	4774

History

Date	User	Type	Result
2023-08-18	masser	NF-PP1	Start=6/5, B1=970000000, B2=173630000000
2023-08-17	JacobZ	NF-PM1	B1=68000000000, B2=265422648792401100
2023-07-23	masser	NF-PM1	B1=68000000000, B2=27645729188327250
2023-07-10	masser	NF-PP1	Start=199/29, B1=970000000, B2=38800000000
2022-03-28	Anton Repko	NF	no factor from 2^64 to 2^66
2021-05-12	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-01-21	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2018-11-06	snme2pm1	NF	no factor from 2^63 to 2^64
2016-10-30	snme2pm1	NF	no factor from 2^62 to 2^63
2016-06-27	-Anonymous-	NF-PM1	B1=100000000000, B2=1000000000000, E=12
2016-05-30	mikr	NF-PM1	B1=50000000000, B2=3200000000000, E=12
2016-05-17	-Anonymous-	NF-PM1	B1=10000000000, B2=100000000000, E=12
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-07-21	Sid & Andy	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	7360AF4407EB1F83
2015-02-01	Jayder	NF-PM1	B1=1308096280, B2=81101969375, E=12
2012-11-08	bcp19	NF	no factor from 2^60 to 2^61
2010-08-10	chalsall	NF	no factor from 2^59 to 2^60
2010-08-10	chalsall	NF	no factor from 2^58 to 2^59