20090515, 07:02  #1 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
3·3,109 Posts 
The Pi sequences
Some fun sequences (just got bored and...):
31415926535897932384626433832795 3141592653589793238462643383279 314159265358979323846264338327 31415926535897932384626433832 3141592653589793238462643383 314159265358979323846264338 31415926535897932384626433 3141592653589793238462643 314159265358979323846264 31415926535897932384626 3141592653589793238462 314159265358979323846 31415926535897932384 3141592653589793238 played with this one mostly this evening... i2000 314159265358979323 31415926535897932 known... i2903 3141592653589793 314159265358979 31415926535897 ...many terminate easily... 3141592653589 314159265358 31415926535 3141592653 314159265 31415926 3141592 apparently very well known... i5793 now 314159 31415 3141 314 31 3 Most probably, there's a web page somewhere for these. P.S. Almost forgot to mention that one of them has a pair of large twin primes in the sequence (multplied by 28): Code:
353 . 308670651623397999473342274798943631525179049572401128447547169906943100908 = 2^2 * 7 * 11023951843692785695476509814247986840184966056157183158840970353819396461 354 . 308670651623397999473342274798943631525179049572401128447547169906943100964 = 2^2 * 7 * 11023951843692785695476509814247986840184966056157183158840970353819396463 355 . 308670651623397999473342274798943631525179049572401128447547169906943101020 = 2^2 * 3^6 * 5 * 7 * 5711 * 650437663189 * 814182819266197613617285670287769380770882879696986623 Last fiddled with by Batalov on 20090515 at 07:34 Reason: twins 
20090515, 07:23  #2 
Nov 2008
2×3^{3}×43 Posts 
I'd guess 3141592 is a sidesequence.

20090515, 07:30  #3 
"Frank <^>"
Dec 2004
CDP Janesville
2×1,061 Posts 
This line right here:
Code:
23. 12280 = 2^3 * 5 * 307 Last fiddled with by schickel on 20090515 at 07:31 Reason: Stupid fat fingers.... 
20090515, 08:39  #5 
Jun 2003
2^{3}×607 Posts 
If you click on any of the fully factored lines, it will show exactly which sequence it is (in the "Additional Information" section). In this case it is 8760
Last fiddled with by axn on 20090515 at 08:40 
20090515, 09:10  #6 
"Frank <^>"
Dec 2004
CDP Janesville
2·1,061 Posts 

20090515, 10:17  #7 
Jun 2003
2^{3}×607 Posts 
Yep. Very nifty feature. Which brings me to the next suggestion. Will it be possible to upload the whole list of Aliquot Sequences (from all the sources, including Terminated sequences) uploaded into the database? This will streamline the analysis for sequence merging. For example, I pushed on 10^6+2 for quite some time, only to turn out that it merges with 330594 (I guess after someone (you?) uploaded it).

20090515, 10:51  #8  
Nov 2008
2·3^{3}·43 Posts 
Quote:


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