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A037920
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Trajectory of 8 under prime factor concatenation procedure.
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0
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8, 2, 2, 2, 2, 3, 37, 3, 19, 41, 3, 3, 3, 7, 13, 13, 3, 11123771, 7, 149, 317, 941, 229, 31219729, 11, 2084656339, 3, 347, 911, 118189, 11, 613, 496501723, 97, 130517, 917327, 53, 1832651281459, 3, 3, 3, 11, 139, 653, 3863, 5107
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listen;
history;
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internal format)
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OFFSET
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0,1
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LINKS
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PROG
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(Python)
from sympy import factorint
def iterate(n):
flst, f = [n], sorted(factorint(n, multiple=True))
while len(f) > 1:
flst += f
f = sorted(factorint(int("".join(map(str, f))), multiple=True))
return flst
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CROSSREFS
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KEYWORD
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fini,full,nonn,tabf,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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