7 621 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 2^183 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	72000000000
B2 =	82656994240821000

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	34335 / 105362

Estimated T-Level: 56.6 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	46B3	0
Verified		George Woltman	01804FB3C473C6B3	0
Verified		Brian J. Beesley	01804FB3C473C6B3	0
Verified	2015-04-11	MadPoo	01804FB3C473C6B3	3719

History

Date	User	Type	Result
2023-08-17	masser	NF-PP1	Start=6/5, B1=1110000000, B2=198690000000
2023-07-20	masser	NF-PM1	B1=72000000000, B2=82656994240821000
2023-07-10	masser	NF-PP1	Start=130/53, B1=1110000000, B2=44400000000
2022-02-28	Anton Repko	NF	no factor from 2^64 to 2^66
2021-05-12	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-01-23	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2018-08-23	snme2pm1	NF	no factor from 2^63 to 2^64
2016-12-11	mikr	NF-PM1	B1=60000000000, B2=4800000000000, E=12
2016-11-24	-Anonymous-	NF-PM1	B1=100000000000, B2=1000000000000, E=12
2016-11-20	-Anonymous-	NF-PM1	B1=40000000000, B2=400000000000, E=12
2016-11-20	-Anonymous-	NF-PM1	B1=20000000000, B2=200000000000, E=12
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2016-02-13	snme2pm1	NF	no factor from 2^62 to 2^63
2015-04-11	MadPoo	C-LL	01804FB3C473C6B3
2015-04-09	snme2pm1	NF	no factor from 2^61 to 2^62
2014-02-09	c10ck3r	NF-PM1	B1=10000000000, B2=200000000000, 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