is 211268847-1
has 3,392,261 decimal digits
takes 3.813 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L89037868C2151DA9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26910.594465.2174%430,0008,500,0000.42664.5822%11.021169.7996%7.2996%
PrimeNet2640.315962.5000%50,0001,500,0000.06334.0085%0.379166.5085%4.0085%
GPU722685.289464.7059%80,0001,900,0000.08792.8796%5.377267.5855%2.8796%
Difference+1+5.3051+0.5115%+350,000+6,600,000+0.3388+1.7026%+5.6438+2.2141%+2.2141%

Known prime factors (1 factor, 123.1 bits, 0.00109223% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
112688471124959320856296676846544034544528324938123.081499145707123495720922710209192
23 × 3 × 19 × 41 × 53 × 337 × 22277 × 51521 × 262819 × 4955359
262,8194,955,3592020-04-241.422e+100.25440.2624

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-10-07T00:00:00ANONYMOUSv4_computers135,0001,721,250---0.109--2.745%
2020-04-24T21:27:29riccardo ubertiColab_noGPU8430,0008,500,0001238123.0810.4277.6250.8534.582%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-15T00:00:00ANONYMOUSv4_computers?264--0.174--
2013-11-22T00:58:00lycornManual testing264265--0.332--
2015-02-01T10:21:00mognutsManual testing265266--0.663--
2015-12-28T01:28:37VictordeHollanderManual testing266267--1.326--
2017-12-27T12:57:35ramgeisManual testing267268--2.653--
2017-12-27T12:57:35ramgeisManual testing268269--5.305--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
50,0005,000,00021.029


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-11-15T00:00:00ANONYMOUSv4_computers89037868C2151DA93.813
2004-04-09T00:00:00ANONYMOUSv4_computers89037868C2151DA93.813


PRP results:
dateuseridcompidcofactorsres64PRP
2020-04-26T07:28:51riccardo ubertiColab_noGPU11
11249593208562966768465440345445283249
F2B006A5799240C1no
2020-04-29T19:27:45CrypticCluecruncher
11249593208562966768465440345445283249
F2B006A5799240C1no


P-1 factor-bounds graph:
B1 = 430,000, B2 = 8,500,000 (stage 2)
B1 = 430,000 (stage 1)
B1 = 135,000, B2 = 1,721,250 (stage 2)
B1 = 135,000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2020-04-29T19:27:45+00:00