A069589
Smallest prime in which the n-th significant digit is a 3.
Original entry on oeis.org
3, 31, 307, 3001, 30011, 300007, 3000017, 30000001, 300000007, 3000000019, 30000000001, 300000000077, 3000000000013, 30000000000011, 300000000000089, 3000000000000037, 30000000000000029, 300000000000000011, 3000000000000000037, 30000000000000000041
Offset: 1
-
seq(nextprime(3*10^(j-1)-1), j=1..32);
-
Join[{3},Table[NextPrime[FromDigits[PadRight[{3},n,0]]],{n,2,20}]] (* Harvey P. Dale, Jun 15 2015 *)
-
a(n) = nextprime(3*10^(n-1)); \\ Michel Marcus, Mar 31 2021
-
from sympy import nextprime
def a(n): return nextprime(3*10**(n-1)-1)
print([a(n) for n in range(1, 21)]) # Michael S. Branicky, Mar 31 2021
A069590
Smallest n-digit prime starting with a 2.
Original entry on oeis.org
2, 23, 211, 2003, 20011, 200003, 2000003, 20000003, 200000033, 2000000011, 20000000089, 200000000041, 2000000000003, 20000000000021, 200000000000027, 2000000000000021, 20000000000000003, 200000000000000003, 2000000000000000057, 20000000000000000011
Offset: 1
-
seq(nextprime(2*10^(n-1)-1), n=1..22);
-
Join[{2}, NextPrime[2*10^Range[20]]] (* Paolo Xausa, Jun 22 2024 *)
A069591
Smallest prime in which the n-th significant digit is a 7.
Original entry on oeis.org
7, 71, 701, 7001, 70001, 700001, 7000003, 70000027, 700000001, 7000000001, 70000000033, 700000000009, 7000000000009, 70000000000009, 700000000000051, 7000000000000037, 70000000000000003, 700000000000000033
Offset: 1
-
7,seq(nextprime(7*10^j),j=1..32);
-
Join[{7},NextPrime/@(7*10^Range[20])] (* Harvey P. Dale, Jun 17 2021 *)
A069592
Smallest prime in which the n-th significant digit is a 5.
Original entry on oeis.org
5, 53, 503, 5003, 50021, 500009, 5000011, 50000017, 500000003, 5000000029, 50000000021, 500000000023, 5000000000053, 50000000000053, 500000000000057, 5000000000000023, 50000000000000051, 500000000000000021
Offset: 1
-
5,seq(nextprime(5*10^j),j=1..32);
-
a069592[n_Integer] := Module[{f}, f[1] = 5; f[i_] := NextPrime[5*10^(i - 1)]; f[n]]; Map[a069592, Range[100]] (* Michael De Vlieger, Aug 06 2014 *)
Join[{5},NextPrime[5*10^Range[20]]] (* Harvey P. Dale, May 15 2016 *)
-
a(n) = nextprime(5*10^n); \\ Michel Marcus, Aug 07 2014
-
import sympy
i=0
print(5)
i=i+1
while i > -1:
a=5*(10**i)
p=sympy.nextprime(a)
print(p)
i=i+1
## Abhiram R Devesh, Jul 31 2014
A069594
Smallest prime in which the n-th significant digit is a 4.
Original entry on oeis.org
41, 401, 4001, 40009, 400009, 4000037, 40000003, 400000009, 4000000007, 40000000003, 400000000019, 4000000000039, 40000000000001, 400000000000063, 4000000000000021, 40000000000000063, 400000000000000013
Offset: 2
-
seq(nextprime(4*10^j),j=1..32);
-
NextPrime[4*10^Range[20]] (* Harvey P. Dale, Apr 11 2013 *)
A069593
Smallest prime in which the n-th significant digit is a 9.
Original entry on oeis.org
19, 97, 907, 9001, 90001, 900001, 9000011, 90000049, 900000011, 9000000001, 90000000019, 900000000013, 9000000000059, 90000000000077, 900000000000019, 9000000000000007, 90000000000000011, 900000000000000017
Offset: 1
-
19,seq(nextprime(9*10^j),j=1..32);
-
Join[{19}, NextPrime[9*10^Range[20]]] (* Paolo Xausa, Jun 23 2024 *)
A069595
Smallest prime in which the n-th significant digit is a 6.
Original entry on oeis.org
61, 601, 6007, 60013, 600011, 6000011, 60000011, 600000001, 6000000001, 60000000029, 600000000031, 6000000000023, 60000000000013, 600000000000073, 6000000000000001, 60000000000000037, 600000000000000043
Offset: 2
-
seq(nextprime(6*10^j),j=1..32);
-
Table[NextPrime[6 10^i],{i,20}] (* Harvey P. Dale, Mar 30 2011 *)
A069597
Smallest prime in which the n-th significant digit is a 0.
Original entry on oeis.org
101, 1009, 10007, 100003, 1000003, 10000019, 100000007, 1000000007, 10000000019, 100000000003, 1000000000039, 10000000000037, 100000000000031, 1000000000000037, 10000000000000061, 100000000000000003
Offset: 2
A069596
Smallest prime in which the n-th significant digit is an 8.
Original entry on oeis.org
83, 809, 8009, 80021, 800011, 8000009, 80000023, 800000011, 8000000011, 80000000021, 800000000047, 8000000000009, 80000000000027, 800000000000017, 8000000000000011, 80000000000000011, 800000000000000119
Offset: 2
-
seq(nextprime(8*10^j),j=1..32);
-
NextPrime/@(8 10^Range[20]) (* Harvey P. Dale, Feb 04 2011 *)
Showing 1-9 of 9 results.