is 256522203-1
has 17,014,879 decimal digits
takes 119.796 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LDD1BAC17B3C9AF9Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2718.458263.3803%695,000695,0002.13592.3838%10.594165.7641%3.4452%
PrimeNet2692.112262.3188%240,00011,000,0002.53925.4667%4.651467.7855%5.4667%
GPU7227333.842464.3836%400,00013,000,0003.33904.0641%37.181368.4477%4.0641%
Difference-2-25.3841-1.0033%+295,000-12,305,000-1.2031-1.6804%-26.5872-2.6836%-2.6836%

Known prime factors (1 factor, 127.7 bits, 0.00022586% known):
Remaining cofactor is PRP status unknown

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
5652220326935820851432640562771844187547454888939127.6632382764597076359582337213942948
22 × 32 × 19 × 443 × 1831 × 134609 × 172787 × 322271 × 572963
322,271572,9632012-08-193.021e+91.03242.0156

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-08-19T15:06:00David Campeaui5-2500k695,000695,00039127.6632.136239.64.2722.384%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-15T00:00:00ANONYMOUSv4_computers?253--2.12292e-5--
2000-01-19T00:00:00ANONYMOUSv4_computers?253--2.12292e-5--
2000-03-08T00:00:00ANONYMOUSv4_computers?254--4.24585e-5--
2000-06-11T00:00:00ANONYMOUSv4_computers?256--0.000--
2001-09-22T00:00:00ANONYMOUSv4_computers?257--0.000--
2002-10-12T00:00:00ANONYMOUSv4_computers?258--0.001--
2003-07-21T00:00:00ThomRuleyv4_computers?260--0.001--
2003-10-31T00:00:00ThomRuleyv4_computers?263--0.017--
2008-03-10T00:00:00James HeinrichWHS264265--0.066--
2008-03-11T10:33:00James HeinrichWHS265266--0.132--
2008-03-12T18:37:00James HeinrichWHS266267--0.264--
2009-11-25T15:31:00pomakiskeith267268--0.529--
2011-04-14T21:14:00Ralf ReckerManual testing268269--1.058--
2011-06-15T03:38:00XyzzyManual testing269270--2.115--
2011-08-25T09:42:00]mh[ Virtekwork3270271--4.231--


ECM factoring results:
Exponent "56522203" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-03-25T18:32:00unconnectedxeon-np1DD1BAC17B3C9AF9E119.8


PRP results:
Exponent "56522203" not found


P-1 factor-bounds graph:
B1 = 695,000 (stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
271
270
269
268
267
266
265
263
260
258
257
256
254
253
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2012-08-19T15:06:00+00:00