sentences:  In September 2013, the 696-bit RSA-210 was factored by Ryan Propper using institutional resources; between March 2013 and October 2014, another 210-digit number (the 117th term in the 'home prime sequence' starting with 49) was completed by a user known as WraithX, using $7600 worth of processing time on Amazon EC2 machines for the sieving, and four months on a dual Xeon E5-2687W v1 for the linear algebra.The largest number factored by Shor's algorithm is 21 in 2012.15 had previously been factored by several labs.