[seqfan] Re: A080906?
RGWv
rgwv at rgwv.com
Sun Dec 7 20:31:39 CET 2008
et al,
Oops. The figure Robert Isreal stated was correct. Somewhere in the
coding I
dropped a plus sign. Therefore the b-text file is inaccurate. I will
redo it in a
moment.
Sequentially yours,
Robert G. Wilson, v
f.firoozbakht at sci.ui.ac.ir wrote:
>Dear Zak,
>
>You are right,
>
>1. 23 is missed.
>2. Terms after 1373 are wrong.
>3. Terms less than 4000 are:
>
>23, 37, 53, 73, 1103, 1117, 1123, 1129, 1153, 1171, 1303, 1307, 1319, 1361,
>1367, 1373, 1723, 1741, 1747, 1753, 1759, 1783, 1789, 1907, 1913, 1931, 1973,
>1979, 1997, 2311, 2341, 2347, 2371, 2383, 2389, 2903, 2917, 2953, 2971, 3119,
>3137, 3167, 3719, 3761, 3767, 3779, 3797
>
>4. I think the definition must change in this way:
>Prime numbers with 2k digits such that the first k-digit number and the last
>(second) k-digit number are both prime numbers.
>
>Farideh
>
>Quoting zak seidov <zakseidov at yahoo.com>:
>
>
>
>>Dear SeqFans,
>>
>>anyone may wish to edit this:
>>
>>1. 23 is missed
>>2. terms after 1373 are wrong
>>3. add more terms
>>4. in %N, it'd be Prime numbers?
>> otherwise why 22 32 52 72 missed?
>>
>>thx, zak
>>
>>PS Were i editor i'd returm it to author(?)
>>
>>%I A080906
>>%S A080906
>>37,53,73,1103,1117,1123,1129,1153,1171,1303,1307,1319,1361,1367,1373,
>>%T A080906 1523,1531,1543,1553,1559,1567,1571,1579,1583,1597
>>%N A080906 Numbers with 2k digits such that the first k digits and
>>the last k digits
>> are both prime numbers.
>>%F A080906 P. Giannopoulos, The brainteasers (unpublished)
>>%Y A080906 Sequence in context: A092105 A101938 A060330
>>this_sequence A101940 A036540
>> A141166
>>%Y A080906 Adjacent sequences: A080903 A080904 A080905 this_sequence
>> A080907 A080908
>> A080909
>>%K A080906 base,easy,nonn
>>%O A080906 0,1
>>%A A080906 P. Giannopoulos (pgiannop1(AT)yahoo.com), Mar 31 2003
>>
>>
>>
>>
>>
>>_______________________________________________
>>
>>Seqfan Mailing list - http://list.seqfan.eu/
>>
>>
>>
>
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