is 213828261-1
has 4,162,722 decimal digits
takes 6.135 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LA6C37E1506FB8119double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.115461.9048%830,00028,012,5001.486710.5258%1.602272.4306%9.3537%
PrimeNet2650.527663.0769%60,0001,900,0000.10313.9947%0.630767.0716%3.9947%
GPU722698.633565.2174%90,0002,200,0000.13192.7925%8.765468.0098%2.7925%
Difference-6-8.5181-3.3126%+740,000+25,812,500+1.3549+7.7334%-7.1632+4.4208%+4.4208%

Known prime factors (1 factor, 120.6 bits, 0.00087194% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
13828261197955358627419226331104862205505796937120.57571576374870064726985954655544
23 × 13 × 71 × 397 × 160751 × 262651 × 556559 × 1039067
556,5591,039,0672011-03-031.228e+100.37500.7287

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-03-08T00:00:00ANONYMOUSv4_computers80,00080,000---0.051--1.981%
2004-03-26T00:00:00ANONYMOUSv4_computers70,000682,500---0.067--4.077%
2004-04-09T00:00:00ANONYMOUSv4_computers70,000682,500---0.067--4.077%
2004-08-04T00:00:00ANONYMOUSv4_computers80,00080,000---0.051--1.981%
2005-01-10T00:00:00ANONYMOUSv4_computers70,000682,500---0.067--4.077%
2011-03-03T21:53:00Carsten Kossendeymother830,00028,012,50037120.5751.48712.272.97310.526%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-07-17T00:00:00lalerav4_computers?256--0.001--
2000-08-17T00:00:00ANONYMOUSv4_computers?265--0.270--


ECM factoring results:
Exponent "13828261" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-22T00:00:00David Barleyv4_computersA6C37E1506FB81196.135
2005-04-02T00:00:00ANONYMOUSv4_computersA6C37E1506FB81196.135


PRP results:
dateuseridcompidcofactorsres64PRP
2020-06-08T05:11:52CrypticCluecruncher
1979553586274192263311048622055057969
A9CBEB0A2D2D890Eno
2020-10-01T04:51:45JaytholomewJaytholomew
1979553586274192263311048622055057969
A9CBEB0A2D2D890Eno


P-1 factor-bounds graph:
B1 = 830,000, B2 = 28,012,500 (stage 2)
B1 = 830,000 (stage 1)
B1 = 70,000, B2 = 682,500 (stage 2)
B1 = 80,000 (stage 1)
B1 = 70,000 (stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
265
263
256
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2020-10-01T04:51:45+00:00