is 2 8815291 - 1
has 2653668 decimal digits
takes 2.302 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L411B4A984008B34Bdouble-checked
PRPM8815291/50388__

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.370764.1791%10500019162500.07713.2781%3.447865.3533%2.8533%
PrimeNet2640.403862.5000%3600010000000.03353.3158%0.437363.7434%1.2434%
GPU722686.761564.7059%5500012000000.04442.3019%6.806065.5183%0.8124%
Difference-1-3.3908-0.5268%+50000+716250+0.0327+0.9762%-3.3581-0.1650%-0.1650%

Known prime factors (2 factors, 143.8 bits, 0.00163122% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8815291503887999292140420392065.4502858033837409
3 × 137 × 7643 × 909833
2012-08-2776439098331.44580.02150.0351
88152913845434581878070316423692478.34721811160753956224
27 × 32 × 72 × 17 × 3037 × 7484047
2021-05-12303774840478,964.50.15550.2883

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
88152911937668337871349389056133328258307117955039144143.797
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-06-17T00:00:00ANONYMOUSv4_computers45000562500---0.028--2.059%
2012-08-27T02:53:00firejuggler10500019162502065.4500.0774.6040.1543.278%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-06T03:02:29firejugglerMaison5000002650000027--0.813
2021-05-12T21:37:38firejugglerMaison5000002600000065P-12478.3470.803


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-07T00:00:00ANONYMOUSv4_computers?261--0.017--
1998-11-28T00:00:00ANONYMOUSv4_computers?263--0.111--
1998-12-06T00:00:00ANONYMOUSv4_computers?263--0.111--
1998-12-13T00:00:00ANONYMOUSv4_computers?263--0.111--
1998-12-21T00:00:00ANONYMOUSv4_computers?263--0.111--
1998-12-27T00:00:00ANONYMOUSv4_computers?263--0.111--
1999-01-02T00:00:00ANONYMOUSv4_computers?263--0.111--
1999-01-10T00:00:00ANONYMOUSv4_computers?263--0.111--
1999-11-10T00:00:00ANONYMOUSv4_computers?264--0.223--


ECM factoring results:
Exponent "8815291" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-30T00:00:00ANONYMOUSv4_computers411B4A984008B34B2.302
2003-07-21T00:00:00ANONYMOUSv4_computers411B4A984008B34B2.302


PRP results:
dateuseridcompidcofactorsres64PRP
2019-02-06T07:01:54artorollofourth
50388799929214042039
FC1D8C1476D248__no
2020-12-04T14:35:46Oliver KruseIOS-5
50388799929214042039
FC1D8C1476D248D4no
2021-05-14T04:27:59kutensvega
50388799929214042039
384543458187807031642369
FC1D8C1476D248D4no


P-1 factor-bounds graph:
B1 = 105000, B2 = 1916250 (stage 2)
B1 = 105000 (stage 1)
B1 = 45000, B2 = 562500 (stage 2)
B1 = 45000 (stage 1)
102
103
104
105
106
102
103
104
105
106
107
TF factor-bounds graph:
267
264
263
261
250
260
270
280
290
2100
Last modified: 2021-05-14T04:27:59+00:00