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Generations

(a) (b) (1) (2)
Parents 1 2 to 3 1905 1905
Grand parents 2 4 to 7 1875 1872
Great grand parents 3 8 to 15 1845 1839
Gt x2 grand parents 4 16 to 31 1815 1797
Gt x3 grand parents 5 32 to 63 1785 1753
Gt x4 grand parents 6 64 to 127 1755 1737
Gt x5 grand parents 7 128 to 255 1725 1689
Gt x6 grand parents 8 256 to 511 1695 1659
Gt x7 grand parents 9 512 to 1023 1665 1624
Gt x8 grand parents 10 1024 to 2047 1635 1606
Gt x9 grand parents 11 2048 to 4095 1605 1576
Gt x10 grand parents 12 4096 to 8191 1575 1532
Gt x11 grand parents 13 8192 to 16383 1545 1515
Gt x12 grand parents 14 16384 to 32767 1515 1475
Gt x13 grand parents 15 32768 to 65535 1485  
Gt x14 grand parents 16 65536 to 131071 1455 1430
Gt x15 grand parents 17 131072 to 262143 1425 1394
Gt x16 grand parents 18 262144 to 524287 1395 1337
Gt x17 grand parents 19 524288 to 1048575 1365 1315
Gt x18 grand parents 20 1048576 to 2097151 1335 1274

(a)Generation numbers

(b)Ancestor numbers

(1)30 year generations

(2)Earliest date in each generation RFM's family

RFM Generations 9/89

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