is 2 3917 - 1
has 1180 decimal digits
takes 0.000 GHz-days to do one PRP test
Has been fully factored.
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677,585.886582.0896%----7,585.886582.0896%12.0896%
PrimeNet2400.000070.0000%500100000.00002.3726%0.000072.3726%2.3726%
GPU722440.000672.7273%500100000.00000.9432%0.000673.6704%0.9432%
Difference+23+7,585.8859+9.3623%-500-100000.0000-0.9432%+7,585.8859+8.4191%+8.4191%

Known prime factors (4 factors, 3,917.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3917407369618.63652
22 × 13
-4139.016e-123.236e-105.866e-10
391746062651602159729297592271.964587983809065097387
3 × 19 × 156833 × 65773819427
2011-02-0515683365773819427130,6940.25820.4823
391776790063284889242223154147756603469204549287547865
31976636337
61202.25798021525765750883613931768900438434011423650175983
3032504

23 × 101 × 1213137695120679252647670407183643985289896660593852763
2021-04-2810112131376951206792526476704071836439852898966605938527633.896e+134.763e+428.895e+42
3917
click to show decimal representation
1,0913,624.1432021-04-28

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
391718764496320520206764229940712890.600
391731281891290302045715204082017459798646388038719086
34744790367967353
67220.893
391735371539315996504585533244523749072788891472521748
369769488754118748207039988052783
83274.221
391714409268599618180076504092288395136032937930269712
111644626864276600338353672893074157927
89292.857
P-1 results:
Exponent "3917" not found


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-02-05T00:00:00James Hintzv4_computers??71.964228,6424.62630e-720,539


ECM factoring results:
Total ECM effort:156.000 GHz-days
Estimated T-Level:43.463
DigitsB1CurvesCompleteFacMiss
20110008970 / 10089.7000.000%
25500008970 / 28032.0360.000%
302500008970 / 64014.0160.000%
3510000008970 / 15805.6770.342%
4030000008970 / 47001.90914.827%
45110000006718 / 97000.69350.027%
5044000000301 / 171000.01898.255%
55110000000201 / 465000.00499.569%

ECM Summary

B1B2factorcurvesGHz-days
30000003000000002,2527.005
1100000011000000006,41773.19
4400000044000000001004.562
1100000001100000000020022.81
85000000014182957708936148.43


Lucas-Lehmer results:
Exponent "3917" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21T18:32:27Oliver KruseOliver-PC
407369
4606265160215972929759
839E52C7553A2C__no
2017-09-21T19:21:08Oliver KruseManual testing
407369
4606265160215972929759
839E52C7553A2C__no
2017-10-12T13:45:09kkmrkkblmbrbkManual testing
407369
4606265160215972929759
839E52C7553A2C__no
2020-04-17T12:32:08Oliver KruseIOS-1
407369
4606265160215972929759
D96E50908E2974__no
2021-04-28T22:30:42ATHec2-PRPCF
407369
4606265160215972929759
76790063284889242223154147756603469204549287547865
31976636337
PRP
2021-04-29T01:01:23ATH5960X
407369
4606265160215972929759
76790063284889242223154147756603469204549287547865
31976636337
PRP


P-1 factor-bounds graph:
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TF factor-bounds graph:
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Last modified: 2021-04-29T01:01:23+00:00