is 21624813-1
has 489,118 decimal digits
takes 0.073 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LD5E89DA4D9DDCE60double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.287668.6567%10,000,000200,000,0001.31819.7639%19.605778.4206%15.2627%
PrimeNet2570.011863.1579%7,000120,0000.00092.5558%0.012765.7137%2.5558%
GPU722610.189165.5738%6,50065,0000.00061.0897%0.189766.6635%1.0897%
Difference+6+18.0985+3.0829%+9,993,500+199,935,000+1.3175+8.6741%+19.4160+11.7571%+11.7571%

Known prime factors (1 factor, 121.6 bits, 0.00748333% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
1624813400201589433308850080039311491239652137121.5901231531226772892788524092654020
22 × 3 × 5 × 53 × 61 × 271 × 599 × 644597 × 2664817 × 22768619
2,664,81722,768,6192018-02-248.876e+100.24350.3513

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-12-01T18:54:00BigBrotherWinston1,000,00020,000,000---0.132--5.678%
2017-08-22T01:11:55Jocelyn Larouche low 4MManual testing2,000,00020,000,00012---0.193--6.004%
2018-02-07T12:58:06Jocelyn Larouche low 4MManual testing2,000,00040,000,00012---0.264--6.829%
2018-02-18T12:32:55Jocelyn Larouche low 4MManual testing2,000,00080,000,00012---0.405--7.661%
2018-02-24T23:22:01VictordeHollanderManual testing10,000,000200,000,0001237121.5901.3180.1452.6369.764%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-17T00:00:00PhillTv4_computers?257--0.012--
2003-06-30T00:00:00ANONYMOUSv4_computers?258--0.024--
2016-02-23T16:28:42Mark RoseManual testing258260--0.071--
2010-05-07T20:20:00For Researcha3_lm260261--0.095--
2016-02-23T16:28:42Mark RoseManual testing261262--0.189--
2010-08-22T04:21:00GrunwalderGIMPManual testing21263--0.982--
2016-02-23T16:28:42Mark RoseManual testing262263--0.604--
2015-04-29T10:57:00omylistManual testing263264--1.208--
2015-04-30T14:35:00monstManual testing264265--2.300--
2015-10-11T16:53:01ramgeisManual testing265266--4.599--
2017-11-17T15:40:09TJAOIManual testing266267--9.198--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
50,0005,000,00028015.72


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-21T00:00:00PhillTv4_computersD5E89DA4D9DDCE600.073
2015-07-10T01:00:00MadPooManual testingD5E89DA4D9DDCE600.073


PRP results:
dateuseridcompidcofactorsres64PRP
2018-02-24T23:35:08ATHxps
4002015894333088500800393114912396521
EF85D4548AC0A6__no
2018-02-26T04:25:20Oliver KruseGTX-1
4002015894333088500800393114912396521
EF85D4548AC0A6__no


P-1 factor-bounds graph:
B1 = 10,000,000, B2 = 200,000,000 (stage 2)
B1 = 10,000,000 (stage 1)
B1 = 2,000,000, B2 = 80,000,000 (stage 2)
B1 = 2,000,000, B2 = 40,000,000 (stage 2)
B1 = 2,000,000, B2 = 20,000,000 (stage 2)
B1 = 1,000,000, B2 = 20,000,000 (stage 2)
B1 = 2,000,000 (stage 1)
B1 = 1,000,000 (stage 1)
105
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105
106
107
108
109
TF factor-bounds graph:
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264
263
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257
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Last modified: 2018-02-26T04:25:20+00:00