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   A145985 Primes resulting from subtracting primes from 10^n in sequence 1
   5, 3, 89, 83, 71, 59, 53, 41, 29, 17, 11, 3, 887, 863, 827, 821, 809, 773, 761, 753, 719, 683, 653, 647, 641, 617, 599, 569, 557, 521, 509, 491, 479, 443, 431, 401, 383, 359, 353, 347, 317, 281, 257, 239, 227, 191, 179, 173, 137, 113, 89, 71, 59, 53, 47, 29, 23 (list; graph; refs; listen; history; text; internal format)
   OFFSET 1,1 COMMENTS Some duplicate primes result from the subtraction algorithm applied, e.g., 3. LINKS EXAMPLE A(13)=887 because 1000-887 = 113 and both 887 and 113 are prime. PROG (UBASIC) 10 'complementary primes under 10^n 20 N=3 30 A=3:S=sqrt(N) 40 B=N\A 50 if B*A=N then 140 60 A=A+2 70 if A<=S then 40 90 if N<10 then T=10-N:if T=prmdiv(T) then print T; N; 100 if N>=10 and N<100 then H=100-N:if H=prmdiv(H) then print H; N; 110 if N>=100 and N<1000 then U=1000-N:if U=prmdiv(U) then print U; N; 120 if N>=1000 and N<10000 then V=10000-N:if V=prmdiv(V) then print V; N 130 if N>10000 then stop 131 stop 140 N=N+2:goto 30 CROSSREFS Sequence in context: A109254 A258091 A255599 * A180403 A267512 A230389 Adjacent sequences:  A145982 A145983 A145984 * A145986 A145987 A145988 KEYWORD easy,nonn AUTHOR Enoch Haga, Oct 27 2008 STATUS approved
  
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  Last modified April 24 04:00 EDT 2019. Contains 322406 sequences. (Running on oeis4.)
explanation: The provided text is an excerpt from the Online Encyclopedia of Integer Sequences (OEIS) and describes the sequence A145985, which lists prime numbers resulting from subtracting primes from powers of 10. The text includes a definition, examples, a UBASIC program to generate the sequence, and cross-references. It does not contain a specific math question or a question and answer.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
  Output rules:
  
  1. Briefly describe the document and mention if it contains a question or a question and answer.
  2. Finalize the output with: Label: no-question,question,question-and-answer,multiple-question,multiple-question-and-answer
distilabel_metadata.role: system
distilabel_metadata.content: This site is supported by donations to The OEIS Foundation.
  
   Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
   A145985 Primes resulting from subtracting primes from 10^n in sequence 1
   5, 3, 89, 83, 71, 59, 53, 41, 29, 17, 11, 3, 887, 863, 827, 821, 809, 773, 761, 753, 719, 683, 653, 647, 641, 617, 599, 569, 557, 521, 509, 491, 479, 443, 431, 401, 383, 359, 353, 347, 317, 281, 257, 239, 227, 191, 179, 173, 137, 113, 89, 71, 59, 53, 47, 29, 23 (list; graph; refs; listen; history; text; internal format)
   OFFSET 1,1 COMMENTS Some duplicate primes result from the subtraction algorithm applied, e.g., 3. LINKS EXAMPLE A(13)=887 because 1000-887 = 113 and both 887 and 113 are prime. PROG (UBASIC) 10 'complementary primes under 10^n 20 N=3 30 A=3:S=sqrt(N) 40 B=N\A 50 if B*A=N then 140 60 A=A+2 70 if A<=S then 40 90 if N<10 then T=10-N:if T=prmdiv(T) then print T; N; 100 if N>=10 and N<100 then H=100-N:if H=prmdiv(H) then print H; N; 110 if N>=100 and N<1000 then U=1000-N:if U=prmdiv(U) then print U; N; 120 if N>=1000 and N<10000 then V=10000-N:if V=prmdiv(V) then print V; N 130 if N>10000 then stop 131 stop 140 N=N+2:goto 30 CROSSREFS Sequence in context: A109254 A258091 A255599 * A180403 A267512 A230389 Adjacent sequences:  A145982 A145983 A145984 * A145986 A145987 A145988 KEYWORD easy,nonn AUTHOR Enoch Haga, Oct 27 2008 STATUS approved
  
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  Last modified April 24 04:00 EDT 2019. Contains 322406 sequences. (Running on oeis4.)
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The provided text is an excerpt from the Online Encyclopedia of Integer Sequences (OEIS) and describes the sequence A145985, which lists prime numbers resulting from subtracting primes from powers of 10. The text includes a definition, examples, a UBASIC program to generate the sequence, and cross-references. It does not contain a specific math question or a question and answer.
  
  Label: no-question