Courtesy of the David Vance SAPP process.

Dave Vance Named FamilyTreeDNA General Manager
www.jdvsite.com - The SAPP algorithm
0---Node# 857: Est. TMRCA: 24 generations or 672 years ago (1278 AD)
        1---61737 John McGrew 1786 Ireland: Map Unknown, 67 STRs FTDNA Known SNP: M222 Est. TMRCA: recent. Kit is courtesy of the FTDNA McGraw Project.
        1---54922 John Thompson 1826 Ireland: Map Big Y-700, 111 STRs FTDNA Known SNP: A2299 Est. TMRCA: recent. Kit is courtesy of the FTDNA M222 Project.

Note: Dates are measured from the epoch which is 1950 and age estimates vary by 15% to 20%. The few red colored ages (on the SNPs) and the green age at the top is Family Tree DNA's eatimate for the SNP itself. The green in-line ages are the SAPP estimate for the kits being analyzed (not the SNP).