is 2 15035827 - 1
has 4526235 decimal digits
takes 7.200 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L07243A079E2EDBBEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.603766.6667%20000006630804180252.171211.0123%315.774870.3374%3.6708%
PrimeNet2650.485263.0769%6500020000000.11834.1444%0.603664.6072%1.5302%
GPU722697.940265.2174%10000026000000.16402.9944%8.104266.2589%1.0415%
Difference+3+55.6635+1.4493%+1900000+6628204180+252.0072+8.0179%+307.6707+4.0785%+2.6293%

Known prime factors (1 factor, 133.2 bits, 0.00088613% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
150358271283607655519724860916840056878728813654341133.237426849702221143160571360676362773
13 × 1327 × 6247 × 22817 × 70117 × 1104097 × 2242332973
2022-03-22110409722423329739.918e+985.557158.44

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-24T00:00:00ANONYMOUSv4_computers1650001938750---0.182--2.159%
2020-06-03T08:11:19ThaZ-1705000002000000012---1.085--4.254%
2022-03-22T08:44:25Luminescence5950X2000000663080418041133.237252.214.40504.311.012%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-04-06T22:39:14ATHec2-P_110000002900000027--2.094


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00Net_Forcev4_computers21257--0.001--
2001-02-04T00:00:00kevshawv4_computers21265--0.485--
2014-06-11T15:20:00NesowaManual testing265266--0.497--
2014-06-11T15:20:00NesowaManual testing266267--0.994--
2015-12-17T18:56:42mikrManual testing267268--1.988--
2017-10-01T21:35:50ramgeisManual testing268269--3.976--
2020-06-30T15:51:52YxinityManual testing269270--7.952--
2021-09-02T18:02:26SRBaseManual testing270271--15.90--
2021-10-10T11:54:56-Anonymous-Manual testing271272--31.81--


ECM factoring results:
Total ECM effort:0.728 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-07-27T00:00:00ANONYMOUSv4_computers07243A079E2EDBBE7.200
2006-08-25T00:00:00gurumaharashiv4_computers07243A079E2EDBBE7.200


PRP results:
No PRP results for M15035827


P-1 factor-bounds graph:
B1 = 2000000, B2 = 6630804180 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 500000, B2 = 20000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 165000, B2 = 1938750 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
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1010
TF factor-bounds graph:
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Last modified: 2022-04-06T22:39:14+00:00