#math trivia for #April28: #119 is the product of two primes differing by 10. Any other day-numbers of this type?

â€” Burt Kaliski Jr. (@modulomathy) April 29, 2012

In other words, are there other day numbers of the form p*q where q = p+10 and p and q are both prime?

The value of p must be less than 15, otherwise p*(p+10) will be larger than 366.

So the possibilities are:

— p = 3, q = 13, p*q = 39

— p = 7, q = 17, p*q = 119

— p = 13, q = 23, p*q = 299