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 Cyclic codes from the first class two-prime Whiteman's generalized cyclotomic sequence with order 6 Bull. Korean Math. Soc.Published online 2019 Mar 11 Pramo Kumar Kewat, and Priti Kumari Indian Institute of Technology(Indian School of Mines), Dhanbad Abstract : Let $p_1$ and $p_2$ be two distinct odd primes with $\mathrm{gcd}(p_1-1,p_2-1)=6$. In this paper, we compute the linear complexity of the first class two-prime Whiteman's generalized cyclotomic sequence (WGCS-I) of order $d=6$. Our results show that their linear complexity is quite good. So, the sequence can be used in many domains such as cryptography and coding theory. This article enrich a method to construct several classes of cyclic codes over $\mathrm{GF}(q)$ with length $n=p_1p_2$ using the two-prime WGCS-I of order 6. We also obtain the lower bounds on the minimum distance of these cyclic codes. Keywords : Cyclic codes, finite fields, cyclotomic sequences MSC numbers : 94A15, 94B15, 94A05 Full-Text :