is 2 14387 - 1
has 4331 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672,065.331079.1045%1000000000308839074349806058,149.577131.3684%60,214.908285.6591%6.5546%
PrimeNet2400.000065.0000%500100000.00003.3899%0.000066.1865%1.1865%
GPU722440.000268.1818%500100000.00001.4122%0.000268.6311%0.4493%
Difference+23+2,065.3309+10.9227%+999999500+3088390743488060+58,149.5771+29.9562%+60,214.9080+17.0279%+6.1053%

Known prime factors (4 factors, 302.4 bits, 2.10184352% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14387374063618.51313
13
-1132.434e-125.715e-107.033e-10
14387123296510290265211753.453428499722980
22 × 5 × 7 × 139 × 22019513
2008-08-29139220195130.14910.00040.0008
14387841238975291840057762862413772996.0872923608032570515249054224
24 × 32 × 23 × 179 × 587 × 937 × 1013 × 2647 × 3343757
2008-08-26264733437571.425e+126.382e-50.0001
143872756234313473955942377204625578076709440141134.340957890565605739884054078204482545600
26 × 3 × 52 × 61 × 359 × 877 × 953 × 79692523 × 136817075942081
2022-01-24796925231368170759420811.124e+132,576.14,811.3

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1438746120662528707475248232271.966
143873146763748145915675269496030820475135114.599
14387103721829973642518423630108880966331434055941746149.539
143871031005276001008381673444293857612108163292126347152.853
1438738798498885430641369098349418340908835217267720127
1
51168.052
1438733983407239362367539859408503450079064264019151273
9608921
57187.793
1438712711935262177605289062429923026046925015791795782
9916331816023
63206.306
1438723186517295310389674127814141178530111826414652245
71902243393631230177
70230.426
1438786732182190356902926732725410916645092201241440629
9039468870551878853699151
75248.939
1438728588166682966497254518990514785015882482623428353
785504878966565168595426395988524217
86283.879
1438710693775393930496862517137148932027396049097567480
302067311540870266660310983962655334183671
92302.392
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-01-24T15:29:41Ethan O'ConnorHighland20201000000000308839074349806041134.34058,1506.85780e-6116,29931.368%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-29T02:24:00ANONYMOUSManual testing??53.453170.0667.20946e-60.138


ECM factoring results:
Total ECM effort:23.328 GHz-days
Estimated T-Level:36.632
DigitsB1CompleteFacMiss
2011000501.8670.000%
2550000110.6080.000%
3025000019.1910.000%
3510000002.7346.495%
4030000000.32672.146%
45110000000.03496.656%
50440000000.00399.690%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000001480.037
250000250000005510.685
50000050000000100.025
10000001000000001,4217.066
30000003000000001,04015.52


Lucas-Lehmer results:
No L-L results for M14387


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21T19:12:59Oliver KrusePRP
374063
12329651029026521
84123897529184005776286241377
F1885BCE4C604844no
2017-09-21T19:22:11Oliver KruseManual testing
374063
12329651029026521
84123897529184005776286241377
F1885BCE4C604844no
2017-10-02T10:05:42kkmrkkblmbrbkManual testing
374063
12329651029026521
84123897529184005776286241377
F1885BCE4C6048__no
2017-12-07T02:54:44ATHManual testing
374063
12329651029026521
84123897529184005776286241377
F1885BCE4C6048__no
2020-04-17T13:48:15Oliver KruseManual testing
374063
12329651029026521
84123897529184005776286241377
CAA3F69216D071__no
2022-01-24T15:54:36SRJ2877LTOS
374063
12329651029026521
84123897529184005776286241377
27562343134739559423772046255780767094401
CAA3F69216D0710Cno


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 3088390743498060 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-01-24T15:54:36+00:00