is 2 1002487 - 1
has 301779 decimal digits
takes 0.030 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
Actual26729.640270.1493%1000000011100000003.005411.7612%32.645673.6601%3.5108%
PrimeNet2560.009664.2857%4500600000.00031.9397%0.009964.9785%0.6927%
GPU722600.153266.6667%4500160000.00020.5774%0.153466.8591%0.1925%
Difference+7+29.4870+3.4826%+9995500+1109984000+3.0052+11.1838%+32.4922+6.8009%+6.8009%

Known prime factors (2 factors, 102.1 bits, 0.01018824% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
100248748119377825.52024
23 × 3
-884.482e-123.438e-76.997e-7
10024871157743010122490203447372476.61657743542316383664
24 × 13 × 19 × 4783 × 8209 × 372131
2012-04-07820937213122,5490.00120.0016

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1002487557098723731989222784906966884931102.136
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T18:58:55alpertronManual testing3000001000000012-
skipped known factor: 48119377
skipped known factor: 115774301012249020344737
--0.036--4.066%
2021-06-15T17:50:16ViliamF3100000001110000000-
skipped known factor: 48119377
skipped known factor: 115774301012249020344737
--3.005--11.761%


Trial Factoring results:
No TF results for M1002487


ECM factoring results:

Old Calculation Method

Total ECM effort:17.422 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:17.422 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002819.77
25000025000000447.650


Lucas-Lehmer results:
No L-L results for M1002487


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T16:01:42Oliver KruseGTX-3
48119377
115774301012249020344737
4944AF19BD7E9B__no
2017-10-16T07:27:49kkmrkkblmbrbkc4.xlarge
48119377
115774301012249020344737
4944AF19BD7E9B__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 1110000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2021-06-15T17:50:16+00:00