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-   -   Happy Palindromic day! (https://www.mersenneforum.org/showthread.php?t=16573)

ET_ 2012-02-21 10:44

Happy Palindromic day!
 
For us Europeans, today is 21-02-2012 :smile:

Luigi

oswald 2012-02-21 18:00

2, 3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14741, 15451, 15551, 16061, 16361, 16561, 16661, 17471, 17971, 18181, 18481, 19391, 19891 and 19991.

oswald 2012-02-21 18:04

[CENTER]2
30203
133020331
1713302033171
12171330203317121
151217133020331712151
1815121713302033171215181
16181512171330203317121518161
331618151217133020331712151816133
9333161815121713302033171215181613339
11933316181512171330203317121518161333911



[LEFT]I imagine both of these have been all ready been posted somewhere.
[/LEFT]
[/CENTER]

xilman 2012-02-21 18:13

[QUOTE=oswald;290284][CENTER]2
30203
133020331
1713302033171
12171330203317121
151217133020331712151
1815121713302033171215181
16181512171330203317121518161
331618151217133020331712151816133
9333161815121713302033171215181613339
11933316181512171330203317121518161333911



[LEFT]I imagine both of these have been all ready been posted somewhere.
[/LEFT]
[/CENTER][/QUOTE]┬┐Que?

fivemack 2012-02-21 18:20

I'm guessing it's the largest tree of palindromic primes growing in that two-digits-at-a-side way


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