is 256886917-1
has 17,124,669 decimal digits
takes 120.569 GHz-days to do one L-L test
Last-known PrimeNet details:
1 L-L tests remaining
ResidueStatus
L-L934582EB256EE8__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27333.625464.3836%1,000,00020,000,0006.25454.9163%39.879969.2999%6.9810%
PrimeNet2692.098762.3188%240,00011,000,0002.53925.4711%4.637867.7899%5.4711%
GPU7227333.625464.3836%400,00013,000,0003.33904.0674%36.964468.4510%4.0674%
Difference---+600,000+7,000,000+2.9155+0.8489%+2.9155+0.8489%+0.8489%

Known prime factors (1 factor, 118.2 bits, 0.00020778% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
5688691738201033514517851939088454540620740136118.2013357629093743808610606236100
22 × 33 × 52 × 947 × 1279 × 1847 × 6361 × 10301 × 8483533
10,3018,483,5332018-04-173.341e+91.45042.6530

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-06T04:19:00curtiscmar229--09L780,000780,000---2.397--1.999%
2018-04-17T16:33:02Sid & AndyRocky1,000,00020,000,000636118.2016.254241.112.514.916%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-23T00:00:00ANONYMOUSv4_computers?253--2.10931e-5--
2000-01-19T00:00:00ANONYMOUSv4_computers?253--2.10931e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers?254--4.21863e-5--
2000-06-28T00:00:00ANONYMOUSv4_computers?256--0.000--
2000-06-29T00:00:00ANONYMOUSv4_computers?256--0.000--
2001-09-30T00:00:00ANONYMOUSv4_computers?257--0.000--
2002-11-16T00:00:00ANONYMOUSv4_computers?258--0.001--
2005-01-20T00:00:00ThomRuleyv4_computers?262--0.005--
2016-02-23T16:40:41Mark RoseManual testing262263--0.017--
2008-08-25T20:41:00Carsten Kossendeyomnibook263264--0.035--
2008-08-26T07:43:00Sturle Sundehaydn.ifi264265--0.066--
2008-08-26T20:53:00Sturle Sundehaydn.ifi265266--0.131--
2008-08-27T22:27:00Sturle Sundehaydn.ifi266267--0.263--
2009-11-24T02:16:00Per Jessenlouiswu2267268--0.525--
2011-06-15T20:42:00eon_blue_apocalypsecc0-7apr268269--1.051--
2011-07-22T14:52:00ANONYMOUS269270--2.102--
2011-09-26T01:10:00ITSTV270271--4.204--
2015-11-22T10:18:09LaurVManual testing271272--8.407--
2016-01-22T19:43:27ANONYMOUSManual testing272273--16.81--


ECM factoring results:
Exponent "56886917" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-03-14T21:19:00curtiscmar229--09L934582EB256EE8__120.6


PRP results:
Exponent "56886917" not found


P-1 factor-bounds graph:
B1 = 1,000,000, B2 = 20,000,000 (stage 2)
B1 = 1,000,000 (stage 1)
B1 = 780,000 (stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
262
258
257
256
254
253
250
260
270
280
290
2100
2110
2120
Last modified: 2018-04-17T16:33:02+00:00