4 703 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 2^181 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	216000000000
B2 =	1000335935248800150

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	21060 / 105362

Estimated T-Level: 56.0 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	580B	0
Verified		George Woltman	E3BF1C365B37D80B	0
Verified		Brian J. Beesley	E3BF1C365B37D80B	0
Verified	2015-04-11	MadPoo	E3BF1C365B37D80B	818

History

Date	User	Type	Result
2024-10-16	timc995	NF-PM1	B1=216000000000, B2=1000335935248800150
2023-08-15	masser	NF-PP1	Start=6/5, B1=1920000000, B2=343680000000
2023-07-10	masser	NF-PP1	Start=123/59, B1=1920000000, B2=76800000000
2023-07-09	masser	NF-PM1	B1=72000000000, B2=84203366959161450
2022-06-12	Anton Repko	NF	no factor from 2^64 to 2^66
2021-12-23	LordJulius	NF-PM1	B1=150000000000, B2=943316046322650
2021-05-13	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-02-05	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2018-08-04	snme2pm1	NF	no factor from 2^63 to 2^64
2016-12-01	snme2pm1	NF	no factor from 2^62 to 2^63
2016-05-21	-Anonymous-	NF-PM1	B1=100000000000, B2=1000000000000, E=12
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-07-03	Sid & Andy	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	E3BF1C365B37D80B
2014-07-25	pdazzl	NF-PM1	B1=30000000000
2012-09-29	bcp19	NF	no factor from 2^60 to 2^61
2011-05-04	Joss	NF-PM1	B1=10000000000
2011-01-27	monst	NF	no factor from 2^58 to 2^60