is 215826841-1
has 4,764,354 decimal digits
takes 8.654 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L2FB3AF4D4EE5FE6Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.100861.9048%300,000300,0000.23793.5443%0.338765.4490%2.3721%
PrimeNet2650.461063.0769%70,0002,200,0000.14754.3117%0.608567.3886%4.3117%
GPU722697.543365.2174%110,0002,800,0000.20343.1201%7.746768.3375%3.1201%
Difference-6-7.4425-3.3126%+190,000-2,500,000+0.0344+0.4241%-7.4080-2.8885%-2.8885%

Known prime factors (1 factor, 120.2 bits, 0.00075965% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
15826841155795986891222290375772112338935900137120.22949218914529823825985164099500
22 × 3 × 53 × 37 × 6907 × 12899 × 135353 × 265739 × 276739
265,739276,7392016-02-221.175e+100.21120.4288

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-06-09T00:00:00ANONYMOUSv4_computers235,000235,000---0.186--3.230%
2016-02-22T13:35:06ThaManual testing300,000300,00037120.2290.23817.310.4763.544%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-01-21T00:00:00Net_Forcev4_computers?258--0.002--
2001-05-06T00:00:00ANONYMOUSv4_computers?265--0.236--
2014-07-20T03:17:00NesowaManual testing266267--0.944--


ECM factoring results:
Exponent "15826841" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-08-31T00:00:00ANONYMOUSv4_computers2FB3AF4D4EE5FE6B8.654
2006-02-01T00:00:00Yeonsoo_Yunv4_computers2FB3AF4D4EE5FE6B8.654


PRP results:
dateuseridcompidcofactorsres64PRP
2020-06-25T09:40:30CrypticClueManual testing
1557959868912222903757721123389359001
535F96667ECC1DD5no
2020-09-18T19:42:00JaytholomewJaytholomew
1557959868912222903757721123389359001
535F96667ECC1DD5no


P-1 factor-bounds graph:
B1 = 300,000 (stage 1)
B1 = 235,000 (stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
267
265
263
258
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2020-09-18T19:42:00+00:00