The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A068851 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A068851

a(1) = 83 ( the smallest prime beginning with 8) and then the smallest prime with leading digits containing a(n-1).
(history; published version)

#5 by Alois P. Heinz at Mon Feb 28 08:13:40 EST 2022

STATUS

proposed

approved

#4 by Georg Fischer at Mon Feb 28 06:10:03 EST 2022

STATUS

editing

proposed

Discussion

Mon Feb 28

07:16

Michel Marcus: make a b-file ?

07:22

Georg Fischer: For 348 characters? More would be probable primes only. But I can create the b-file with 16 terms if you want.

07:37

Alois P. Heinz: there are 17 terms in data now ... no 16-term b-file needed ...

#3 by Georg Fischer at Mon Feb 28 06:06:42 EST 2022

DATA

83, 839, 83903, 8390303, 83903031238390303023, 839030302333, 839030302333001, 83903030233300129, 8390303023330012903, 839030302333001290399, 839030302333001290399003, 8390303023330012903990037, 839030302333001290399003747, 8390303023330012903990037471, 8390303023330012903990037471101, 839030302333001290399003747110143, 839030302333001290399003747110143119

CROSSREFS

Cf. A068849, (a(1)=41), A068850 (61), A068852 (97).

EXTENSIONS

a(5) corrected by and more terms from Georg Fischer, Feb 28 2022

STATUS

approved

editing

Discussion

Mon Feb 28

06:10

Georg Fischer: Checked by <https://www.alpertron.com.ar/ECM.HTM> and a(5)-a(7) proven with <https://primes.utm.edu/curios/includes/primetest.php>.

#2 by N. J. A. Sloane at Thu Dec 05 19:55:14 EST 2013

AUTHOR

_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Mar 12 2002

Discussion

Thu Dec 05

19:55

OEIS Server: https://oeis.org/edit/global/2075

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

a(1) = 83 ( the smallest prime beginning with 8) and then the smallest prime with leading digits containing a(n-1).

DATA

83, 839, 83903, 8390303, 8390303123

OFFSET

1,1

CROSSREFS

Cf. A068849, A068850.

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 12 2002

STATUS

approved