is 2 2305463 - 1
has 694014 decimal digits
takes 0.156 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE75EE2D8C2061AA8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.888567.1642%50000005050000003.158210.9726%16.046770.7671%3.6030%
PrimeNet2580.016762.0690%100001900000.00192.9293%0.018663.1801%1.1111%
GPU722620.266564.5161%120002000000.00221.7383%0.268765.1330%0.6168%
Difference+5+12.6220+2.6481%+4988000+504800000+3.1560+9.2343%+15.7780+5.6342%+5.6342%

Known prime factors (1 factor, 82.6 bits, 0.00358276% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
230546373254145897046693844262812582.5991588707905896704780
22 × 32 × 5 × 11 × 61 × 367 × 35841235103
2017-01-1036735841235103789,000191.28357.26

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.284%
2010-02-12T10:20:00Budannan50000010000000---0.100--4.821%
2018-02-18T19:06:17alpertronManual testing5000001500000012---0.126--5.211%
2021-06-11T03:08:41ViliamF35000000505000000---3.158--10.973%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:11Mark RoseManual testing21260--0.067--
2009-01-16T01:30:00Sturle Sundebach.ifi260261--0.067--
2012-05-13T12:23:00Sebastian HornbostelManual testing261262--0.133--
2013-12-06T02:47:00Jerry HallettManual testing262263--0.426--
2015-02-27T20:35:00VictordeHollanderManual testing263264--0.852--
2015-02-27T20:35:00VictordeHollanderManual testing264265--1.621--
2015-10-22T10:17:23ramgeisManual testing265266--3.241--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.301 GHz-days
Estimated T-Level:1.300
DigitsB1CurvesCompleteFacMiss
201100026 / 1000.26077.004%
255000026 / 2800.09391.117%

New Calculation Method

Total ECM effort:2.301 GHz-days
Estimated T-Level:1.300
DigitsB1CompleteFacMiss
20110000.83943.227%
25500000.07692.700%
302500000.00599.534%


ECM Summary

B1B2factorcurvesGHz-days
500005000000242.124
50000500000020.177


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersE75EE2D8C2061AA80.156


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-11T13:44:44Oliver KruseGTX-1
7325414589704669384426281
D4F5C20A63C748__no
2017-11-29T17:05:44kkmrkkblmbrbkc4.xlarge
7325414589704669384426281
D4F5C20A63C748__no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 505000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
101
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101
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1010
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TF factor-bounds graph:
267
266
265
264
263
262
261
260
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260
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2100
Last modified: 2021-06-11T03:08:41+00:00