Leyland Primes (x^y+y^x primes) - Page 8

NorbSchneider · 2014-08-02, 22:31

I search now in the interval
20,001<=x<=40,000, 201<=y<=400.

I reached x=21,000 and found two new PRPs:
283^20956+20956^283, 51380 digits,
359^20992+20992^359, 53637 digits.

rogue · 2014-08-03, 13:16

Two more PRPs:

2869^11736+11736^2869
3834^11473+11473^3834

Double-checking is now complete for y <= 5000 and x <= 12500 and 10000 < y <= 125000 and x <= 12500. I'm still working on 5000 < y <= 10000 and x <= 12500.

rogue · 2014-08-07, 00:50

Quote:

Originally Posted by rogue

Two more PRPs:

2869^11736+11736^2869
3834^11473+11473^3834

Double-checking is now complete for y <= 5000 and x <= 12500 and 10000 < y <= 125000 and x <= 12500. I'm still working on 5000 < y <= 10000 and x <= 12500.

Verified list for y <= 7000 and x <= 12500.

I'm going on vacation for 17 days starting tomorrow. This will complete while I'm gone so expect an update when I return.

NorbSchneider · 2014-08-09, 19:28

I reached x=22,000 and found one new PRP:
387^21694+21694^387, 56138 digits.

XYYXF · 2014-08-13, 13:28

The page is finally updated: http://xyyxf.at.tut.by/primes.html#0

Please check if it's correct.

rogue · 2014-08-28, 01:56

The double-check has been completed for all x and y <= 12500. Nothing new to report.

NorbSchneider · 2014-08-28, 06:30

I reached x=24,000 and found one new PRP:
247^23412+23412^247, 56018 digits.

NorbSchneider · 2014-09-21, 18:48

I reached x=26,000 and found one new PRP:
291^25742+25742^291, 63426 digits.

NorbSchneider · 2014-10-05, 00:33

I reached x=27,000 and found one new PRP:
267^26336+26336^267, 63905 digits.

NorbSchneider · 2014-11-01, 07:59

I reached x=30,000 and found one new PRP:
257^29356+29356^257, 70746 digits.

firejuggler · 2014-11-04, 23:13

reserving x=2501=> 3000 and y=12501=>15000
already found one
2696^14313+14313^2696 is a 3-PRP (49104 digits)

2014-08-13, 13:28	#82
XYYXF Jan 2005 Minsk, Belarus 400₁₀ Posts	The page is finally updated: http://xyyxf.at.tut.by/primes.html#0 Please check if it's correct. Last fiddled with by XYYXF on 2014-08-13 at 13:30

2014-11-04, 23:13	#88
firejuggler Apr 2010 Over the rainbow 2³·5²·13 Posts	reserving x=2501=> 3000 and y=12501=>15000 already found one 2696^14313+14313^2696 is a 3-PRP (49104 digits) Last fiddled with by firejuggler on 2014-11-04 at 23:19

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2014-08-02, 22:31	#78
NorbSchneider "Norbert" Jul 2014 Budapest 109 Posts	I search now in the interval 20,001<=x<=40,000, 201<=y<=400. I reached x=21,000 and found two new PRPs: 283^20956+20956^283, 51380 digits, 359^20992+20992^359, 53637 digits.

2014-08-03, 13:16	#79
rogue "Mark" Apr 2003 Between here and the 14313₈ Posts	Two more PRPs: 2869^11736+11736^2869 3834^11473+11473^3834 Double-checking is now complete for y <= 5000 and x <= 12500 and 10000 < y <= 125000 and x <= 12500. I'm still working on 5000 < y <= 10000 and x <= 12500.

2014-08-09, 19:28	#81
NorbSchneider "Norbert" Jul 2014 Budapest 109 Posts	I reached x=22,000 and found one new PRP: 387^21694+21694^387, 56138 digits.

2014-08-28, 01:56	#83
rogue "Mark" Apr 2003 Between here and the 11×577 Posts	The double-check has been completed for all x and y <= 12500. Nothing new to report.

2014-08-28, 06:30	#84
NorbSchneider "Norbert" Jul 2014 Budapest 109 Posts	I reached x=24,000 and found one new PRP: 247^23412+23412^247, 56018 digits.

2014-09-21, 18:48	#85
NorbSchneider "Norbert" Jul 2014 Budapest 109₁₀ Posts	I reached x=26,000 and found one new PRP: 291^25742+25742^291, 63426 digits.

2014-10-05, 00:33	#86
NorbSchneider "Norbert" Jul 2014 Budapest 109 Posts	I reached x=27,000 and found one new PRP: 267^26336+26336^267, 63905 digits.

2014-11-01, 07:59	#87
NorbSchneider "Norbert" Jul 2014 Budapest 109 Posts	I reached x=30,000 and found one new PRP: 257^29356+29356^257, 70746 digits.