I found the quotation.
The Mad Hatter wrote:
"As discussed in Chapter IX, . . . there is a limit of 1,000 years of
subjective experience, because a brain can only code a mere 10^15 bits.
"~Frank J. Tipler, The Physics of Immortality, (New York: Doubleday,
1994), p. 255
glenn
Foundation,Fall and Flood
http://members.gnn.com/GRMorton/dmd.htm