is 2 522787 - 1
has 157375 decimal digits
takes 0.008 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
Actual26756.837571.6418%100000008300000001.156210.7592%57.993774.6929%3.0511%
PrimeNet2400.000052.5000%50001800000.000319.3631%0.000361.6975%9.1975%
GPU722440.000056.8182%90003000000.000514.6002%0.000563.1228%6.3046%
Difference+23+56.8375+14.8236%+9991000+829700000+1.1556-3.8410%+57.9932+11.5701%+11.5701%

Known prime factors (1 factor, 60.2 bits, 0.01152437% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
52278713690888648589134791960.2481309413647297
7 × 631 × 296448641
2007-08-186312964486410.40550.34150.6379

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-12-22T00:00:00ANONYMOUSv4_computers2000200000---0.000--0.179%
2002-01-22T00:00:00ANONYMOUSv4_computers4096409600---0.001--0.390%
2002-02-10T00:00:00Jocelyn Larouchev4_computers10000100000---0.000--0.421%
2002-06-23T00:00:00ANONYMOUSv4_computers327683276800---0.004--1.772%
2002-08-31T00:00:00ANONYMOUSv4_computers655366553600---0.009--2.513%
2003-04-27T00:00:00ANONYMOUSv4_computers13107213107200---0.018--3.382%
2016-03-17T18:48:30alpertronManual testing15000005000000012---0.088--6.129%
2021-05-14T08:27:27happy5214Manual testing10000000830000000-
skipped known factor: 1369088864858913479
--1.156--10.759%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-14T08:27:27happy5214Manual testing500000036500000027--0.485


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-03-15T00:00:00ANONYMOUSv4_computers253254--0.002--
2022-03-07T08:26:28LordJuliusManual testing254255--0.005--
2001-04-01T00:00:00ANONYMOUSv4_computers21256--0.018--
2002-01-02T00:00:00ANONYMOUSv4_computers21257--0.037--
2003-12-13T00:00:00ANONYMOUSv4_computers21258--0.073--


ECM factoring results:

Old Calculation Method

Total ECM effort:16.115 GHz-days
Estimated T-Level:26.125
DigitsB1CurvesCompleteFacMiss
2011000425 / 1004.2501.396%
2550000425 / 2801.51821.859%
30250000144 / 6400.22579.838%

New Calculation Method

Total ECM effort:16.115 GHz-days
Estimated T-Level:26.125
DigitsB1CompleteFacMiss
201100023.8990.000%
25500003.0284.840%
302500000.28775.049%
3510000000.02297.832%
4030000000.00199.860%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002814.524
2500002500000014411.59


Lucas-Lehmer results:
No L-L results for M522787


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-27T10:01:45Oliver KruseGTX-1
1369088864858913479
D849425E40159C__no
2017-09-28T09:42:45Oliver KruseManual testing
1369088864858913479
D849425E40159C__no
2017-11-07T07:19:05kkmrkkblmbrbkc4.xlarge
1369088864858913479
D849425E40159C__no
2020-04-19T02:23:53Oliver KruseAddPrpType5
1369088864858913479
6D964D529BF39B__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 830000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 1500000, B2 = 50000000 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 10000, B2 = 100000 (P-1 stage 2)
B1 = 2000, B2 = 200000 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-07T08:26:28+00:00