4 007 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 =	10000000000000
B2 =	9223372036854775807

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	105362 / 105362
65	800000000	194238 / 194238
70	2400000000	73430 / 350860

Estimated T-Level: 66.0 ⓘ

TF below 2^214 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Verified		Unknown	1FF8	0	Unknown,(aka U)
Verified		George Woltman	EDBE70D1AE701FF8	0	Woltman,Prime95,first web release,(aka W4)
Verified		Brian J. Beesley	EDBE70D1AE701FF8	0	Mac,John Sweeney,v1.4,(aka J3)
Verified	2015-04-11	MadPoo 🙂	EDBE70D1AE701FF8	554	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2026-02-16	Kamil Gorski	NF-PM1	B1=10000000000000, B2=9.2682612254896E+18
2026-02-04	Kamil Gorski	NF-PM1	B1=10000000000000
2025-07-21	One Man	NF-PM1	B1=1013897566893, B2=1457999819618992650
2025-06-20	-anonymous-	NF-PM1	B1=4000000000000, B2=1.2016700776796E+19
2025-02-13	NStorm	NF-PM1	B1=222000000000, B2=797946672322800
2023-08-13	masser	NF-PP1	Start=6/5, B1=2300000000, B2=411700000000
2023-07-10	masser	NF-PP1	Start=128/13, B1=2300000000, B2=92000000000
2023-05-16	-anonymous-	NF-PM1	B1=81000000000, B2=812832933743280450
2022-06-12	Anton Repko	NF	no factor TF: 65-66
2021-05-13	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-02-15	Anton Repko	NF	no factor TF: 64-65
2018-06-19	snme2pm1	NF	no factor TF: 63-64
2016-11-08	snme2pm1	NF	no factor TF: 62-63
2016-02-23	LaurV	NF	no factor TF: 57-58
2015-06-04	Sid & Andy	NF	no factor TF: 61-62
2015-04-11	MadPoo 🙂	C-LL	EDBE70D1AE701FF8
2012-09-29	bcp19	NF	no factor TF: 60-61
2012-08-16	BloodIce	NF-PM1	B1=200000000000, B2=2000000000000, E=12
2012-07-16	BloodIce	NF-PM1	B1=100000000000
2011-04-25	Joss	NF-PM1	B1=10000000000
2011-02-21	kurly	NF-PM1	B1=5000000000, B2=300000000000, E=12
2011-02-16	monst	NF	no factor TF: 58-60
2003-01-25	-anonymous-	NF	no factor TF: 1-57
2003-01-01	-anonymous-	NF-PM1	B1=4290000000
2002-09-22	-anonymous-	NF-PM1	B1=3221225472, B2=4290000000, E=48
2002-08-03	-anonymous-	NF-PM1	B1=2147483648, B2=4290000000, E=48
2002-06-02	-anonymous-	NF-PM1	B1=1073741824, B2=4290000000, E=48
2001-06-23	-anonymous-	NF-PM1	B1=3000000000, B2=4290000000
2001-06-09	-anonymous-	NF-PM1	B1=43000000, B2=4290000000
2001-02-11	-anonymous-	NF-PM1	B1=1000000, B2=100000000
2000-08-24	-anonymous-	NF	no factor TF: 1-56
2000-02-09	-anonymous-	NF	no factor TF: 54-55
1999-12-23	-anonymous-	NF	no factor TF: 53-54
1999-09-22	-anonymous-	NF	no factor TF: 52-53

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