4 703 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁶

TF target 2⁴⁴

P-1

B1 =	3000000000000
B2 =	9003842338903041630

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	24187 / 105362

Estimated T-Level: 56.1 ⓘ

TF below 2^182 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Verified		Unknown	580B	0	Unknown,(aka U)
Verified		George Woltman	E3BF1C365B37D80B	0	Woltman,Prime95,first web release,(aka W4)
Verified		Brian J. Beesley	E3BF1C365B37D80B	0	Mac,John Sweeney,v1.4,(aka J3)
Verified	2015-04-11	MadPoo 🙂	E3BF1C365B37D80B	818	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2026-02-16	-anonymous-	NF-PM1	B1=3000000000000, B2=9003842338903041630
2025-04-14	One Man	NF-PM1	B1=925557062164, B2=97335819939908550
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 TF: 64-66
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 TF: 64-65
2018-08-04	snme2pm1	NF	no factor TF: 63-64
2016-12-01	snme2pm1	NF	no factor TF: 62-63
2016-05-21	-anonymous-	NF-PM1	B1=100000000000, B2=1000000000000, E=12
2016-02-23	LaurV	NF	no factor TF: 57-58
2015-07-03	Sid & Andy	NF	no factor TF: 61-62
2015-04-11	MadPoo 🙂	C-LL	E3BF1C365B37D80B
2014-07-25	pdazzl	NF-PM1	B1=30000000000
2012-09-29	bcp19	NF	no factor TF: 60-61
2011-05-04	Joss	NF-PM1	B1=10000000000
2011-01-27	monst	NF	no factor TF: 58-60
2003-01-09	-anonymous-	NF-PM1	B1=4290000000
2003-01-09	-anonymous-	NF	no factor TF: 1-57
2002-09-22	-anonymous-	NF-PM1	B1=3221225472, B2=4290000000, E=48
2002-08-10	-anonymous-	NF-PM1	B1=2147483648, B2=4290000000, E=48
2002-06-02	-anonymous-	NF-PM1	B1=1073741824, B2=4290000000, E=48
2001-07-17	-anonymous-	NF-PM1	B1=3000000000, B2=4290000000
2001-07-07	-anonymous-	NF-PM1	B1=3000000000, B2=4290000000
2001-06-17	-anonymous-	NF-PM1	B1=43000000, B2=4290000000
2001-02-11	-anonymous-	NF-PM1	B1=1000000, B2=100000000
2000-08-17	-anonymous-	NF	no factor TF: 1-56
2000-02-09	-anonymous-	NF	no factor TF: 54-55
1999-12-30	-anonymous-	NF	no factor TF: 53-54
1999-09-30	-anonymous-	NF	no factor TF: 52-53

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