is 2 1758989 - 1
has 529509 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5208E23510EE3E06double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.892668.6567%2475400866600000.55557.9553%17.448171.1502%2.4935%
PrimeNet2570.010963.1579%80001400000.00122.8052%0.012164.1914%1.0335%
GPU722610.174665.5738%80001100000.00111.4142%0.175766.0606%0.4869%
Difference+6+16.7180+3.0829%+2467400+86550000+0.5544+6.5411%+17.2724+5.0896%+5.0896%

Known prime factors (1 factor, 94.8 bits, 0.00538676% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1758989333683232642119178958710090072994.7529485085826065972526227
32 × 971 × 82487 × 164431 × 80022169
2015-04-29164431800221692.650e+90.35520.6405

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:29:00Carsten Kossendeyleela950001567500---0.014--2.413%
2014-04-08T23:01:00Jocelyn LaroucheManual testing100000100000---0.008--0.888%
2014-05-09T20:31:00Jocelyn LaroucheManual testing136489136489---0.011--1.059%
2014-09-17T22:20:00ANONYMOUSManual testing172978172978---0.014--1.202%
2015-04-29T10:48:00mikrMSI247540086660000122994.7520.5560.1911.1117.955%
2016-03-16T12:30:07alpertronManual testing5000001500000012---0.101--5.044%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-24T04:42:00Architects Cubedi4l_1260261--0.087--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.907--
2015-04-28T22:52:00snme2pm1Manual testing263264--1.116--
2015-04-28T22:52:00snme2pm1Manual testing264265--2.124--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.880 GHz-days
Estimated T-Level:24.643
DigitsB1CurvesCompleteFacMiss
2011000260 / 1002.6007.331%
2550000260 / 2800.92939.446%

New Calculation Method

Total ECM effort:17.880 GHz-days
Estimated T-Level:24.643
DigitsB1CompleteFacMiss
20110008.3870.023%
25500000.75846.859%
302500000.04795.439%
3510000000.00299.786%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026017.88


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00akohlerv4_computers5208E23510EE3E060.095


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T08:51:57Oliver KruseGTX-3
33368323264211917895871009007
C4D0F93FFBE186__no
2017-11-04T01:27:06kkmrkkblmbrbkc4.xlarge
33368323264211917895871009007
C4D0F93FFBE186__no


P-1 factor-bounds graph:
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 95000, B2 = 1567500 (P-1 stage 2)
B1 = 172978 (P-1 stage 1)
B1 = 136489 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
267
265
264
263
261
258
250
260
270
280
290
2100
Last modified: 2020-08-21T10:53:46+00:00