4 ms·
Impossible? Danes write dates as dd-mm-yy according to http://en.wikipedia.org/wiki/Calendar_date http://en.wikipedia.org/wiki/Calendar_date, so your birthday c
by swolchok 17y ago
Impossible? Danes write dates as dd-mm-yy according to http://en.wikipedia.org/wiki/Calendar_date http://en.wikipedia.org/wiki/Calendar_date, so your birthday can have at most one leading zero and thus is >= 10100. 9973 is the largest 4-digit prime number, and 9973 + 2 is 1) not prime and 2) not a 5-digit number.
- mixmax 17y agoWe're talking about two sets of twin primes, each part of the social security number being in each set. I'm sorry I didn't make it clear in the OP.