P · Proven prime
★
Interesting number. 40487, a base-5 Wieferich prime (40487^2 divides 5^40486-1), the third of only seven known.
Value
40487
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Term #1 of the aliquot sequence of
121449
Term #4 of the Home prime · Base 6 sequence of
78
Term #4 of the Inverse home prime · Base 3 sequence of
3254
Term #1 of the Inverse home prime · Base 5 sequence of
6476
Term #1 of the Inverse home prime · Base 9 sequence of
17465
Term #1 of the Home prime · Base 12 sequence of
17089
Term #1 of the Home prime · Base 20 sequence of
2435
Term #1 of the Home prime · Base 22 sequence of
25629
Term #1 of the Home prime · Base 23 sequence of
5943
Term #2 of the Home prime · Base 36 sequence of
3983
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
26952
Term #1 of the Inverse home prime · Base 12 sequence of
6463
Term #1 of the Inverse home prime · Base 13 sequence of
8365
Term #5 of the Inverse home prime · Base 15 sequence of
38
Term #1 of the Inverse home prime · Base 26 sequence of
6785
Term #5 of the Conway climb · Base 6 sequence of
50
Term #1 of the Conway climb · Base 12 sequence of
17089
Term #1 of the Conway climb · Base 20 sequence of
2435
Term #1 of the Conway climb · Base 22 sequence of
25629
Term #1 of the Conway climb · Base 23 sequence of
5943
Term #3 of the Conway climb · Base 36 sequence of
207
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
20238
Term #8 of the Distinct-prime home prime, descending · Base 3 sequence of
2257
Term #2 of the Second-class home prime · Base 16 sequence of
34962
Term #4 of the Mid-divisor concatenation · Base 2 sequence of
10816
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
32607
Term #1 of the Mid-divisor concatenation · Base 10 sequence of
19480
Term #1 of the Mid-divisor concatenation · Base 16 sequence of
32607
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '40487' --detail 2
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get_number","params":{"target":{"expr":"40487"},"decimal":false,"detail":2}}'