6 247 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 2^184 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	39000000000
B2 =	163113042636343800

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	40553 / 105362

Estimated T-Level: 56.9 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	013A	0
Verified		George Woltman	5433E64B0AD5813A	0
Verified		Brian J. Beesley	5433E64B0AD5813A	0
Verified	2015-04-11	MadPoo	5433E64B0AD5813A	715

History

Date	User	Type	Result
2023-08-17	masser	NF-PP1	Start=6/5, B1=1390000000, B2=248810000000
2023-08-01	-Anonymous-	NF-PM1	B1=39000000000, B2=163113042636343800
2023-07-14	masser	NF-PM1	B1=72000000000, B2=110837175002954400
2023-07-10	masser	NF-PP1	Start=152/43, B1=1390000000, B2=55600000000
2022-04-09	Anton Repko	NF	no factor from 2^64 to 2^66
2021-05-12	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-01-31	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2017-09-14	snme2pm1	NF	no factor from 2^63 to 2^64
2016-12-02	-Anonymous-	NF-PM1	B1=100000000000, B2=1000000000000, E=12
2016-10-22	snme2pm1	NF	no factor from 2^62 to 2^63
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-07-28	Sid & Andy	NF	no factor from 2^61 to 2^62
2015-05-20	MadPoo	NF-PM1	B1=100000000000
2015-04-11	MadPoo	C-LL	5433E64B0AD5813A
2012-10-11	bcp19	NF	no factor from 2^60 to 2^61
2011-12-10	nextPrime	NF-PM1	B1=10000000000
2010-12-30	monst	NF	no factor from 2^58 to 2^60