I've submitted curios on the following little things:

1) The number of primes under 1000 digits that are a concatenation of 3 or a power of 3 and 7 or a power of 7 that are prime such that the alternative concatenation is also prime is 100.

2) The first primorial having a string of ten identical digits is 84017#, 84017 being the (2^13)-th prime.

3) ABRACADABRA produces two emirps, as 1218131412181, 1812141318121, 1182141311821 and 1281131412811 are all prime (and, incidentally, there is only one other prime among the four numbers in bases 2 through 18; and the 9th base beyond 18 in which both 12(18)131412(18)1 and 1(18)214131(18)21 are prime is 60606).

[Non-text portions of this message have been removed]