El Regreso (song) the famous phrase "cogito ergo sum" (I think, therefore I am) . Today is almost proved that many of the existing people are losing the ability to think and act to solve this and other very similar problems.<br>As already said... "Errare humanum est". El Regreso (song) "El Regreso" (English: "The Return") is the third track from WarCry's "¿Dónde Está La Luz?". "El Regreso" is a well-known song among the band's fans and one of their most controversial ones due to the lyrics referring to revenge from a son to his alcoholic father who abused of him and his mother. "El
Descartes number only one currently known. If is an odd almost perfect number, that is, and is taken as a 'spoof' prime, then is a Descartes number, since . If were prime, would be an odd perfect number. Descartes number In number theory, a Descartes number is an odd number which would have been an odd perfect number, if one of its composite factors were prime. They are named after René Descartes who observed that the number would be an odd perfect number if only were a prime number, since the sum-of-divisors function for would satisfy, if 22021 were prime, where we