I was born on December 25th, 1968, in Ploiesti, Romania. I am currently living in Bucuresti, Romania. I have a degree in law, but I am fond of arithmetic. Arithmetic, not in the sense of "study of quantity" (see Wikipedia - definition of "arithmetic") but in the Pythagorean sense: each number has a special personality (not incidentally, my research aims especially odd numbers). I am mainly interested in Number Theory, especially in primes and pseudoprimes. My email address is mariuscoman13(AT)gmail.com.