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A056784 First nonprime in a sequence of consecutive nonprimes which is at least twice as long as any earlier run of consecutive nonprimes in this list. 1
1, 8, 90, 524, 9552, 31398, 2010734, 2300942550, 2614941710600, 352521223451364324 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

Thomas R. Nicely, First occurrence of prime gaps

EXAMPLE

2300942550 is the first of 319 consecutive composite numbers.

2614941710600 is the first of 651 consecutive composite numbers.

352521223451364324 is the first of 1327 consecutive composite numbers.

CROSSREFS

Cf. A008950, A008995, A008996, A114100, A002386.

Sequence in context: A077192 A128304 A247728 * A166769 A187667 A092956

Adjacent sequences:  A056781 A056782 A056783 * A056785 A056786 A056787

KEYWORD

nonn

AUTHOR

Frank James Michael Richards, Jun 19 2001

EXTENSIONS

Corrected by R. J. Mathar, Sep 29 2006

Three more terms from Donovan Johnson, Jan 28 2008

STATUS

approved

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Last modified October 22 02:46 EDT 2018. Contains 316431 sequences. (Running on oeis4.)