is 2 1535563 - 1
has 462251 decimal digits
takes 0.069 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L951D2EBF79629166double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.350568.6567%500000150000000.08354.9624%19.434170.2121%1.5554%
PrimeNet2570.012563.1579%65001100000.00082.4160%0.013364.0480%0.8901%
GPU722610.200065.5738%6500550000.00061.0150%0.200665.9232%0.3494%
Difference+6+19.1505+3.0829%+493500+14945000+0.0830+3.9474%+19.2334+4.2889%+4.2889%

Known prime factors (3 factors, 232.5 bits, 0.01513844% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
153556359170235967409015208172272.3251926662597607816
23 × 32 × 43 × 89 × 6992213939
2019-06-148969922139391,088.824.67346.083
1535563520697136804237692030092375.46316954600260759008
25 × 529831258148719
2013-09-02325298312581487195,897.81,869,5983,491,888
1535563308182030135215172350392572684.67210034822085945518756
22 × 983 × 2552091069670783
2019-06-1498325520910696707832,748,0249,005,47916,819,726

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
153556330809772452260997570779408812390877611253835345147.788
153556318235203444015837801501310618950203435199771296948156.997
1535563160469500705923837627688895095910080326771752431349160.135
153556394950182223418210133967148160899630019326600123305
82926511863873123721
70232.460
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000290000---0.002--0.992%
2011-02-01T10:48:00James HeinrichWHS800001340000---0.010--2.195%
2016-03-17T19:16:02alpertronManual testing5000001500000012---0.084--4.962%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-18T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-08-08T00:00:00ANONYMOUSv4_computers21258--0.025--
2010-04-25T17:20:00Architects Cubeda3_bu2260261--0.100--
2010-05-04T02:59:00GrunwalderGIMPManual testing21263--1.039--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.904 GHz-days
Estimated T-Level:24.446
DigitsB1CurvesCompleteFacMiss
2011000249 / 1002.4908.188%
2550000249 / 2800.88941.030%

New Calculation Method

Total ECM effort:13.904 GHz-days
Estimated T-Level:24.446
DigitsB1CompleteFacMiss
20110008.0320.032%
25500000.72648.387%
302500000.04595.628%
3510000000.00299.796%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000001096.087
500005000000140.782
5000050000001267.036


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-07T00:00:00ANONYMOUSv4_computers951D2EBF796291660.069


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T15:56:09Oliver KruseGTX-0
52069713680423769203009
485A49069633A8__no
2017-10-30T06:43:43kkmrkkblmbrbkc4.xlarge
52069713680423769203009
485A49069633A8__no
2019-06-14T14:59:44ATHec2-PRPCF
5917023596740901520817
52069713680423769203009
30818203013521517235039257
EF368F7C2D614AE7no
2019-06-15T11:46:26marssystemssystem11
5917023596740901520817
52069713680423769203009
30818203013521517235039257
EF368F7C2D614AE7no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 80000, B2 = 1340000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 20000, B2 = 290000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
TF factor-bounds graph:
267
263
261
258
257
250
260
270
280
290
2100
Last modified: 2019-06-21T09:35:22+00:00