is 2 12437 - 1
has 3744 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672,389.154779.1045%100000000100000000000.182812.2305%2,389.337681.6601%
Target2440.000268.1818%500100000.00001.3510%0.000268.6117%
Difference+23+2,389.1546+10.9227%+99999500+9999990000+0.1828+10.8794%+2,389.3374+13.0484%

Known prime factors (6 factors, 238.7 bits, 1.91916641% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1243799497516.6024
22
-447.026e-131.144e-92.328e-9
12437596977619.18724
23 × 3
2008-08-26885.645e-122.288e-94.656e-9
12437355121869431135.0481427683
83 × 103 × 167
2008-08-261031673.762e-73.045e-85.995e-8
1243731327865747691341.511125946232
23 × 53 × 139 × 2137
2008-08-2613921372.566e-57.088e-88.090e-8
1243749478522342979431652.136198916629183
32 × 9049 × 2442463
2008-08-26904924424630.06964.050e-57.108e-5
12437217456071163459640517192374.203874230405899572407
3 × 7 × 103 × 937 × 431349994597
2008-08-29937431349994597317,4086.720712.552

57 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-09-09kkmrkkblmbrbkManual testing1000000001000000000012-
skipped known factor: 99497
skipped known factor: 596977
skipped known factor: 35512186943
skipped known factor: 3132786574769
skipped known factor: 4947852234297943
--0.183--12.230%
2021-08-27Seth_TrManual testing400000000400000000-
skipped known factor: 99497
skipped known factor: 596977
skipped known factor: 35512186943
skipped known factor: 3132786574769
skipped known factor: 4947852234297943
--0.114--7.762%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26ANONYMOUSManual testing??41.511132.10055e-60.0000.000
2008-08-26ANONYMOUSManual testing??35.048118.20528e-90.0006.45283e-7
2008-08-26ANONYMOUSManual testing??52.136160.0215.19671e-60.045
2008-08-26ANONYMOUSManual testing??19.18762.91734e-140.0002.30302e-12


ECM factoring results:
Total ECM effort:41.272 GHz-days
Estimated T-Level:38.419
DigitsB1CompleteFacMiss
2011000499.6190.000%
2550000130.4830.000%
3025000026.3510.000%
3510000004.5221.087%
4030000000.68450.468%
45110000000.09291.227%
50440000000.01198.891%
551100000000.00199.881%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000001560.032
1000001000000010.000
2000002000000010.001
250000250000001300.134
4000004000000010.002
50000050000000250.051
10000001000000001,5176.243
30000003000000002533.123
11000000110000000070031.69


Lucas-Lehmer results:
No L-L results for M12437


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KrusePRP
99497
596977
35512186943
3132786574769
4947852234297943
21745607116345964051719
9ECE5DD5F50C1664no
2017-09-21Oliver KruseManual testing
99497
596977
35512186943
3132786574769
4947852234297943
21745607116345964051719
9ECE5DD5F50C1664no
2017-10-02kkmrkkblmbrbkManual testing
99497
596977
35512186943
3132786574769
4947852234297943
21745607116345964051719
9ECE5DD5F50C16__no
2017-12-07ATHManual testing
99497
596977
35512186943
3132786574769
4947852234297943
21745607116345964051719
9ECE5DD5F50C16__no
2020-04-17Oliver KruseManual testing
99497
596977
35512186943
3132786574769
4947852234297943
21745607116345964051719
587EBB05BB7969__no


P-1 factor-bounds graph:
B1 = 100000000, B2 = 10000000000 (P-1 stage 2)
B1 = 400000000 (P-1 stage 1)
B1 = 100000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
109
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
2
this exponent TF target: 44
TF double-checked to: 67.7
ECM T-Level=38.42 ~= 111-bit
250
260
270
280
290
2100
2110
2120
Last modified: 2023-03-23T17:39:31+00:00